1.Wu Jiangmin once acted as the Chinese A_________ to France and played an important role in the cultural exchange between the two countries.

20.It’s ten years since the scientist _________ on his life’s work of discovering the valuable chemical.

　 a.made for　　　　 b.set out　　　　　　 c.took off　　　 d.turned up

19.Stress can be extremely damaging to your health. Exercise, _______, can reduce its effects.

　 a.at the same time　 b.while　　　　　　　 c.though　　　 d.meanwhile

18.They had to watch their young family _______ through lack of food.

　 a.die off　　　　　 b.die out　　　　　　 c.die down　　 d.die away

17.I was ________ surprised to see him.

　 a.somewhat　　　　 b.somehow　　　　　 c.anyway　　　 d.anyhow

16.______ such a difficult problem, he didn’t know what to do?

　 a.Faced　　　　　 b.Facing　　　　　　 c.Faced to　　　 d.Facing with

15.The new research team was led by the _______ engineer.

　 a.main　　　　　　 b.major　　　　　　　 c.chief　　　　 d.primarry

14.What could have happened, ________, as far as thr river bank?

　 a.as Bob walked farther　　　　　　　　　 b.if Bob should walk farther

　 c.had Bob walked farther　　　　　　　　 d.if Bob walked farther

13.I would go to the concert but I _______ no time.

　 a.had　　　　　　 b.have　　　　　　　 c.had had　　　 d.have had

12. Nowhere else in such a small town, I think, _______ a book as good as this one.

　 you get　　　 b.you can get　　　　 c.you get　　　 d.you will get