Chủ nhật, 22/12/2024
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Câu hỏi:

20/07/2024 224

Students are not allowed to handle these chemicals unless they _________under the supervision of a teacher.

A. are

Đáp án chính xác

B. were

C. have been

D. had been

 Xem lời giải

Trả lời:

verified Giải bởi Vietjack

Đáp án A

Kiến thức về câu điều kiện

Căn cứ vào thì hiện tại đơn trong mệnh đề chính đang chia “are not allowed” nên ta suy ra đây là câu điều kiện loại 1.

=> chọn được phương án A

Tạm dịch: Học sinh không được phép xử lý các hóa chất này, nếu không có sự giám sát của giáo viên.

Cấu trúc khác cần lưu ý:

+ Allow/permit sb to do st = let sb do st: cho phép ai làm gì

+ Allow/permit doing st: cho phép làm gì

+ Be allowed/permitted to do st: được phép làm gì

+ Be under the supervision of sb: dưới sự dám sát của ai

Câu trả lời này có hữu ích không?

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