1. If you don't know the answer to the question, don't put your hand up

=> Unless you know the answer to the question, put your hand up.

Bước giải : Trừ phi bạn biết câu trả lời, ....

2. If it doesn't rain tonight, we'll water the trees tomorrow.

=> Unless it rain, we'll water the trees tomorrow.

Bước giải: Trừ khi trời mưa, ...

3. If he doesn't wear a scarf and his jumper, he will catch a cold.

=> Unless he wear a scarf and his jumper, he won't catch a cold.

Bước giải : Trừ khi anh ta choàng khăn và ....

4. A man can't join the army if he isn't good health.

=> Unless he is good health, he can join the army.

Bước giải: Trừ khi anh ấy có 1 sức khỏe tốt ,...

5. If you don't phone me from London twice a week, I'll be really upset.

=> Unless you phone me from London twice a week, I won't be really upset.

Bước giải: Trừ khi bạn gọi cho tôi 2 lần 1 tuần,...

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