Bộ 5 đề thi giữa kì 2 Tiếng Anh 9 i-Learn Smart World có đáp án - Đề 1

Lack of sleep is also a concern, (38) ______, making teens feel tired and unfocused.

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Lack of sleep is also a concern, (38) ______, making teens feel tired and unfocused.

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Giải thích

Chọn C.