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Điền vào chỗ trống với các động từ khiếm khuyết thích hợp.

1. You _______ wear jeans at work. Men have to wear a suit and a tie.
2. In order to reduce your ecological footprint, you _______ use second-hand items instead of buying new ones.
3. (Notice on a train) Quiet carriage. Passengers _______ play music or talk on the phone in this part of the train.
4. I’ve bought you a box of chocolate. I thought you _______ like it.
5. A new shopping mall will be open next weekend. We _______ visit it.
6. I want to buy mom a birthday present. I _______ start saving money for it.
7. I’ve run out of stationery stuff. _______ we go to the bookstore now?
8. _______ we ride our bikes to school tomorrow? I want to protect our environment.
9. If you really need a new mattress, you _______ order it on the Internet.
10. You _______ hit your sister again! Do you understand?