(Viên chức Mầm non) bài tập tiếng Anh theo chủ đề có đáp án - Test yourself

It was not until the students were seated________ he had the wrong test booklets.

40/55

It was not until the students were seated________ he had the wrong test booklets.

that the proctor realized

when the proctor realized

as soon as the proctor realized

and the proctor realized

Giải thích

Đáp án đúng là a