Part 1: Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

Câu hỏi

While the teacher was explaining to the whole class, she ____ carefully.

A. didn't listen

B. wasn't listening

C. had listened

D. wasn't listened

Đáp án
B. wasn't listening

Câu hỏi thuộc Bài tập:

KIỂM TRA HỌC KỲ 1