10. With China        (participate) in the world trade more frequently,the world economy is developing more rapidly and steadily.

9. In China,people over sixtyfive can enjoy some        (privilege) in public places as long as they can provide their identifications.

8. Do you know when the plane will take off? The passengers        (die) to know it.

7. He was blown off the course and found himself in an unknown land? from        he eventually reached Greenland.

6. If        (operate) according to the instructions,the machine's lifetime can be lengthened.

5. ―I'd like to apply for the position of assistant manag?er  sir.

―What experience do you have that is relevant         this position?

4. When reading English novels,I often come         some idiomatic expressions that I can't understand.

3. According to experts,China needs        (adjust) its family planning policy to fight against a worsening gender (性別) imbalance and an aging population.

2. Suffering from war,poverty and illness,many African children are        need of food,love and care.

 1. It remains doubtful        immediate measures could be taken to prevent underground water pollution.