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

Câu hỏi

It was last month __________ we volunteered in an old people’s home nearby.

A. which

B. where

C. that

D. when

Đáp án
C. that

Câu hỏi thuộc Bài tập:

E11- GS- Unit 8- Test for unit