Choose A, B, C, or D that best completes each sentence.
If tourists _______ rubbish in the river, the water would be cleaner now.
- A.
don't throw
- B.
threw
- C.
throw
- D.
didn’t throw
Kiến thức: Câu điều kiện
Ta thấy vế sau có dạng would+V_infi => cấu trúc câu điều kiện II (không có thật ở hiện tại): S+would+V_infi + if + S+ V (V chia ở thì quá khứ đơn)
Dựa vào ngữ nghĩa của câu ta có: Nếu khách du lịch không rác trên sông, bây giờ nước sẽ sạch hơn.
=> Mệnh đề If chia ở thể phủ định
=> If tourists didn't rubbish in the river, the water would be cleaner now.
Đáp án : D
Các bài tập cùng chuyên đề
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