Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 7 to 21.

Câu hỏi

They ______ the floor when their mother came home.

A. cleaned

B. were cleaning

C. clean

D. are cleaning

Đáp án
B. were cleaning

Câu hỏi thuộc Bài tập:

Đề thi thử tiếng Anh THPT Quốc gia 2023 - Sở GDĐT Thừa Thiên Huế