Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 7)

It was not until she could read and write when she was allowed to use smartphone

19/50

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

It was not until she could read and write when she was allowed to use smartphone.

not until

when

allowed

use

Giải thích

Đáp án B.

Đổi when thành that

Cấu trúc: It was not until … that + S-V.