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

Câu hỏi

While Lan ____________ as a volunteer in the countryside, she met an old friend.

A. was working

B. worked

C. had worked

D. worked

Đáp án
A. was working

Câu hỏi thuộc Bài tập:

UNIT 4: FOR A BETTER COMMUNITY - VOCABULARY AND GRAMMAR (1) - Bài tập Tiếng Anh lớp 10 - Global Success