(Viên chức Mầm non) 1128 câu trắc nghiệm Tiếng Anh A2 có đáp án - Phần 24

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………….. the new program was progressing, there was a power cut

18/30

………….. the new program was progressing, there was a power cut

After

While

As soon as

Until

Giải thích

Chọn đáp án B