Câu hỏi
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions from 8 to 19.
When he................. us to go in, we............... outside the exam room for over half and hour.
let - are standing
let - have stood
let - had been standing
let - have been standing
H. Huong
Giáo viên
1