In this idiomatic expression sentence improvement question, you must decide whether the phrase "see through his tricks" is correctly used in the sentence "Nida was too clever to see through his tricks", and choose the most appropriate alternative if an improvement is needed.

Introduction / Context:
This question checks your understanding of the English idiom "see through someone or something", which means to detect deception or realise that someone is trying to trick you. The sentence "Nida was too clever to see through his tricks" contains this idiom, and you must decide whether it is already correct or if one of the alternative phrases is better.

Given Data / Assumptions:

• Sentence given: Nida was too clever to see through his tricks.
• The underlined part is the phrase "see through his tricks".
• The context suggests that Nida is clever enough not to be fooled.
• We assume the exam is mainly testing idiomatic use of the phrasal verb "see through".

Concept / Approach:
The idiom "see through" a person or a trick means to recognise the truth behind an attempt to deceive. For example, "She could see through his lies" or "They saw through the clever marketing." Therefore "see through his tricks" is a correct and natural expression meaning that Nida recognises his tricks for what they are. The combination with "too clever" is slightly stylistic, but the key part of the test is the idiom itself, which is correctly used with "through".

Step-by-Step Solution:
Identify the core meaning: Nida is clever and is not easily deceived.Recall that "see through" means to detect or expose a trick or lie.Check that the object of the phrasal verb is appropriate: "his tricks" fits naturally.Compare this idiom with the alternatives "see his tricks", "see into his tricks", and "see over his tricks".Recognise that only "see through his tricks" is a standard idiom in English.

Verification / Alternative check:
If we rewrite the sentence as "Nida was clever enough to see through his tricks", the meaning becomes absolutely clear: she recognises his tricks and therefore will not be misled. This confirms that "see through" is the correct expression and that no change to the idiom is needed in the answer choices.

Why Other Options Are Wrong:
Option A: "see his tricks" is grammatically possible but loses the idiomatic sense of detecting deception and simply means to observe the tricks. Option B: "see into his tricks" is not a standard phrase and sounds unnatural. Option C: "see over his tricks" has no recognised idiomatic meaning in this context. Option D: "No improvement" is correct because the idiom "see through his tricks" is already appropriate.

Common Pitfalls:
Candidates sometimes assume that any phrase offered in options must replace the original underlined words. However, in many exam questions the best choice is "No improvement" when the underlined phrase is already correct. It is also easy to confuse idioms like "see through", "see into", and "see over" if you try to guess from literal meanings rather than from remembered usage in authentic examples.

Final Answer:
The sentence is already correct, so the right choice is No improvement for the phrase "see through his tricks".