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

Câu hỏi

She thanked me for_______her a lot when she was in trouble.

A. helped

B. helping

C. to help

D. help

Đáp án
B. helping

Câu hỏi thuộc Bài tập:

E11- GS- Unit 4- Practice 6