4. Complete the passage with the modal verbs in the box. (Điền vào đoạn văn bằng những trợ động từ k
Câu 4. Complete the passage with the modal verbs in the box. (Điền vào đoạn văn bằng những trợ động từ khiếm khuyết trong khung)
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can can’t must must not should shouldn't ought to ought not to |
Scientists say life started in the ocean. However, humans aren’t natural swimmers. We (1) _______ swim as babies, but we forget and then we (2) _______ learn to swim again.
We (3) _______ forget that our world is mainly water. So we (4) _______ all learn to swim. We (5) _______ try to stay away from water, but it is very difficult. The time always comes when we need to cross water.
We (6) _______ learn to swim when we are young. It is easier to learn then. Our parents (7) _______ help. They (8) _______ give us the opportunity to learn to swim.
Trả lời:
1 - can 2 - must
3 - must not 4 - should
5 - can 6 - ought to/ should
7 - can/should 8 - should/ must