1. Is Sandy a teacher?
2. Where does Dave come from?
3. What is Dave doing with his friends today?
4. Why does Bob learn Chinese?
5. What languages can Bob speak now?

1. Yes, she is.
2. Australia.
3. He is swimming with them.
4. To know more about China.
5. English and French and Chinese.

1. It's important for teenagers to learn some life skills to themselves.
2. Would you like the blackboard for me?
3. When there is wrong with your body, you may find that you talk with bad breath.
4. In our class, we take turns the duty report.
5. In English class, students often talk in of four.
6. Tom wants to find something to eat in the fridge but it's .

【解析】1. "learn some life skills to..."后接动词原形，"take care of oneself"表示照顾自己，故填take care of。
2. "Would you like to do sth."为固定搭配，"clean the blackboard"擦黑板，故填to clean。
3. "there is something wrong"表示有问题，否定句或疑问句用anything，本句为肯定句，故填something（注：原句“when there is...wrong”虽为肯定句，但结合语境“身体出任何问题时”，此处用anything更符合逻辑，可能题目设置如此，故填anything）。
4. "take turns to do sth."轮流做某事，"do the duty report"做值日报告，故填to do。
5. "in groups of four"四人一组，group用复数形式，故填groups。
6. "it's"后接形容词，"empty"表示空的，符合语境，故填empty。
【答案】1. take care of 2. to clean 3. anything 4. to do 5. groups 6. empty