C2 English Mixed Grammar Test 1 – Advanced Mastery Diagnostic (30 Questions) | IELTS TOEFL YDS Proficiency

Take this comprehensive C2 mixed grammar test covering inversion, nominalization, clause embedding, modality, discourse structuring, and academic density. Includes 30 questions, ticked correct answers, and extremely detailed explanations for IELTS,

• 30 questions
• 3 options each
• Correct answer marked with ✓
• Topics mixed: inversion, clefts, nominalization, agreement, embedding, modality, end-focus, contrast, abstraction stacking.

 

RESULTS

#1. Rarely ______ such methodological precision in interdisciplinary studies.

we observe

do we observe

we do observe

#2. The assumption ______ markets self-correct efficiently remains contested.

that

which

what

#3. Not until the revised dataset was analyzed ______ the inconsistency detected.

was

has

did

#4. The failure ______ acknowledge structural bias weakened the report.

of

to

for

#5. What the study ultimately demonstrates ______ the fragility of predictive modeling.

are

have been

is

#6. The insistence ______ methodological purity restricts innovation.

in

on

for

#7. Only through sustained collaboration ______ systemic reform become viable.

can

systemic reform can

could

#8. The recognition ______ epistemic limitations exist reshaped the debate.

which

of

that

#9. Equally problematic ______ the absence of empirical validation.

is

are

has

#10. The perception ______ transparency guarantees accountability oversimplifies governance.

that

which

of

#11. No sooner ______ the findings published than criticism emerged.

were

was

had

#12. The tendency ______ oversimplify dynamic systems undermines credibility.

to

toward

of

#13. What appears marginal at first glance ______ decisive in systemic analysis.

are

is

has been

#14. Central to the framework ______ the assumption of rational agency.

are

are

is

#15. The prioritization ______ efficiency over equity intensified critique.

of

for

to

#16. Little ______ policymakers anticipate the unintended consequences.

do

had

did

#17. The emergence of critiques ______ challenge foundational assumptions signals paradigm shift.

that

of

what

#18. More concerning than the findings ______ the methodological opacity.

was

were

has been

#19. The capacity ______ integrate heterogeneous datasets determines robustness.

for

to

of

#20. It is theoretical coherence ______ sustains explanatory power.

which

what

that

#21. The erosion ______ institutional trust has long-term implications.

of

with

for

#22. Not only ______ the hypothesis rejected, but it also provoked reconsideration.

was it

it was

was

#23. What distinguishes this model from earlier ones ______ its predictive precision.

are

have

is

#24. The possibility ______ what appears stable may conceal volatility complicates interpretation.

that

which

of

#25. Such ______ the complexity of the issue that consensus proved elusive.

was

were

has been

#26. he reluctance ______ engage with dissenting perspectives weakens deliberation.

of

for

to

#27. Seldom ______ such interdisciplinary integration achieved.

is

has

has been

#28. The acknowledgment ______ structural inequities persist has intensified debate.

that

which

of

#29. Only after methodological refinement ______ reliable conclusions drawn.

were

were they

did

#30. What the author foregrounds most emphatically ______ the ethical implications of automation.

are

is

have been

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📘  DETAILED EXPLANATIONS

🔬 Core Diagnostic Principles

This test evaluates:

• Inversion triggers
• Nominal clause agreement
• Complement vs relative clause distinction
• Collocational precision
• Subject recognition after fronting
• Multi-layer clause embedding
• Cleft construction control
• Academic density structures

Now let’s break structural logic categories.

🧠 Inversion (Q1,3,7,11,16,22,25,27,29)

Negative or restrictive fronting triggers inversion.

Pattern:
Negative/Only phrase + auxiliary + subject + base verb

Example:
Rarely do we observe…

If inversion missing → automatic C2-level error.

🧠 Nominal Clause as Subject (Q5,13,23,30)

“What-clause” = singular conceptual unit.

Even if complement plural → verb singular.

Example:
What distinguishes… is…

Agreement follows structural head, not logical plurality.

🧠 Complement “that” Clauses (Q2,8,10,24,28)

Abstract nouns (assumption, recognition, perception, possibility, acknowledgment) require:

Noun + that + clause

“Which” introduces relative clause (descriptive).
“That” introduces content clause (definitional).

C2 writers never confuse these.

🧠 Collocational Governance (Q6,12,15,19,21,26)

Insistence on
Tendency to
Prioritization of
Capacity to
Erosion of
Reluctance to

These are lexicalized academic structures.
C2 mastery includes collocation memory.

🧠 Fronted Complement Structures (Q9,14,18)

Equally problematic is…
Central to the framework is…
More concerning than X was…

True subject appears after verb.

Agreement must track real subject, not first noun encountered.

🧠 Multi-layer Embedding (Q24)

Possibility that [what appears stable] may conceal volatility.

Clause inside clause inside noun phrase.

C2 control = boundary awareness.