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

Câu hỏi

The mother asked her son _______.

A. where he had been

B. whether I had been

C. where has he been

D. where had he been

Đáp án
A. where he had been

Câu hỏi thuộc Bài tập:

Ms. Dung Purple - Unit 9: Protecting the Environment - Grammar