Bộ 20 đề kiểm tra Tiếng Anh thi vào 10 có đáp án - Đề 17
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(25)......is extremely accurate as well. Officials from Greenwich Observatory have the clock checked twice a day.

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(25)......is extremely accurate as well. Officials from Greenwich Observatory have the clock checked twice a day.

but

however

and

so

Giải thích

Chọn đáp án A