1. The polluted air in the city is badly endangering (危害)the health of the residents.
2. Jim went to answer the phone. Meanwhile (同时), Peter started to prepare lunch.
3. Don’t you think it’s a wonder (奇迹)that he should come back alive?
4. He always wants to be the focus (焦点)of attention.
5. Try not to upset (使沮丧)yourself about losing your job—you can soon find another one.
6. They had to struggle (斗争)for their lives against weather and wild animals.
