How should I approach this reading question type?

First, identify the core claim of the text. Look for transition words like 'however' or 'furthermore' which signal changes in the author's logic. Then, match the evidence directly to the options provided.

What is the common trap in wrong answers for this category?

The most common trap is 'extreme language' (e.g., 'always', 'never') or 'unsupported inferences' that go beyond what is explicitly stated in the provided text snippet.

Why is the correct answer better than the close alternatives?

The correct answer usually captures the most direct and necessary evidence from the text, whereas alternatives often focus on minor details or distort the author's primary subject.

Set 11: Form, Structure & Sense (Intermediate)

Explanation

Answer: B

PASSAGE

Recent studies show that the Amazon rainforest produces approximately 20% of the world's _______ making it critical for global climate stability.

Which choice completes the text so that it conforms to the conventions of Standard English?

A. oxygen;

B. oxygen,✓ Correct

C. oxygen

D. oxygen:

Detailed Answer Explanation

[Variation 1] This question tests your understanding of sentence function and text organization. A comma is needed before the participial phrase 'making it critical.' This phrase modifies the main clause and should be set off by a comma. Each sentence in a well-constructed text serves a specific purpose. Consider what role this sentence plays in the argument: does it introduce, support, contrast, or conclude an idea? Understanding why an author includes specific sentences helps you grasp the overall argument. Each sentence should serve a clear purpose: introducing ideas, providing evidence, acknowledging counterarguments, or drawing conclusions. Identify the role to understand the structure.

Key Evidence:

• "produces approximately 20%"

• "making it critical"

Why others are wrong: C (Without punctuation, the sentence runs together incorrectly.), A (A semicolon is used between independent clauses; 'making it critical' is not independent.), D (A colon would introduce a list or explanation, not a participial phrase.).

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