They have carried out (A) exhausting research (B) into the effects of smartphones on schoolchildren’s

45/50

Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions

They have carried out (A) exhausting research (B) into the effects of smartphones on schoolchildren’s (C) behaviour and their (D) academic performance

exhausting

into

behavior

academic performance

Giải thích

Đáp án A

Sửa lại: exhausting → exhaustive

Ta có:

- exhausting (a): khiến cạn kiệt sức lực

- exhaustive (a): toàn diện, xét đến mọi khía cạnh

Ở đây ý của người viết là “cuộc nghiên cứu toàn diện” nên phải dung exhaustive chứ không phải exhausting