Choose the best option to complete each of the following sentences.

Câu hỏi

Nancyvoluntary work when shethe second year university student.

A. does - was

B. did - was

C. did - is

D. does - were

Đáp án
B. did - was

Câu hỏi thuộc Bài tập:

Ms. Dung Purple - Unit 4: For a Better Community - Grammar