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5. The doctor told him (什么時間吃藥) .

4. You’d better find out (把它放在哪里) .

3. Will you show me (怎樣使用這臺機器) ?

2. I don't know (接下來做什么) .

1.  (選擇那一個) is still ? question.

7. You be careful when you' swim cross the lake.

6. Be quick!If you miss the last train,you will get home by taxi.

5. In some parts of the world,you boil the water before drinking it.

4. When travelling,you take care of your health.

3. You often wait a long time for a bus.