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

When the boss walked into the office, his secretary ________.

A. has been typing

B. was typing

C. is typing

D. had typed

Đáp án
B. was typing

Câu hỏi thuộc Bài tập:

Đề thi thử tiếng Anh THPT Quốc gia 2023 (Mã đề 009)