The correct idiom in the following sentence is () (2 points) A. He can't help laughing when he sees this joke.

Test analysis: In A, "laugh" itself means "laugh" as the predicate; The verb "easy and happy" in C cannot be used as an adverbial; The "shameless questioning" in D refers to the shameless questioning of people who are not as good as themselves, which is taken out of context.

Comments: Use common words accurately and appropriately according to the needs of language situations. Including content words, function words, idioms and so on. The words tested should be common words, and students are not required to do detailed analysis. The context of choosing words should be easy to understand. The range of words is also very wide, and carpet review is impossible and unnecessary. The key is to guide students to analyze whether the use of these words is accurate and appropriate through some common synonym discrimination methods. The use of related words is mainly to guide students to analyze the relationship between two clauses. The words involved in word analysis and idiom use are often used frequently, and there is generally no problem of understanding the meaning. We can analyze them from the aspects of meaning, scope, degree, praise and criticism, style and so on.