Tổng hợp 30 Đề thi thử THPTQG 2021 môn Tiếng anh hay nhất có lời giải (Đề số 14)

When the children realized that they were by themselves in the dark, they became really frightening.

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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.

When the children realized that they (A) were by themselves in (B) the dark, they (C) became really (D) frightening.

were

the dark

became

frightening

Giải thích

ĐÁP ÁN D