She did a funny little curtsy which Josh and Silver couldn't help __ at

Câu hỏi :

Mark the letter A. B. C. or D to indicate the correct answer to each of the following questions.

A. laugh

B. laughing

C. to laugh

D. to laughing

* Đáp án

B

* Hướng dẫn giải

Đáp án B

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