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

Câu hỏi

I my pen while I my homework.

A. was breaking - was doing

B. was breaking - did

C. broke – did

D. broke - was doing

Đáp án
D. broke - was doing

Câu hỏi thuộc Bài tập:

I ____ my pen while I ____ my homework.