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)
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.
1 - can 2 - must
3 - must not 4 - should
5 - can 6 - ought to/ should
7 - can/should 8 - should/ must