30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 6)

The visitors were complaining in the rain. about having to wait

80/80

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The visitors were complaining                          in the rain.

for waiting

me about waiting

about having to wait

that they have to wait

Giải thích

Đáp án là C. complain to someone about (doing ) something: phàn nàn với ai về