Đề thi chính thức Tiếng Anh vào 10 năm 2020-2021 (Đề 19)
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Ann couldn’t go to my birthday party last night because she had to ______ her

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Ann couldn’t go to my birthday party last night because she had to ______ her younger sister.

look after

look up

look at

look for

Giải thích

Đáp án A