15 Đề ôn thi thpt Quốc Gia môn Tiếng Anh có lời giải chi tiết (Đề số 11)

______ number of boys were swimming in the lake, but I didn’t know ______ exact number of them

12/50

______ number of boys were swimming in the lake, but I didn’t know ______ exact number of them.

A/the

The/an

The/the

A/an

Giải thích

Đáp án A