( )43. They arrived at the hotel just now. They didn't know which room_______.

A. to live       B. for living     C. to live in

( )44. My parents gave me a present on my birthday. I couldn’t wait ____ it and found it.

A. open       B. to open     C. opening

( )45. Nobody can answer such difficult questions ___ Wang Ming

A. but        B. among       C. except

( )46. The teacher told us to speak English_____.

A. as many as possible     B. as much as we can C. as much as we possible

( )47. _____young trees have been planted along the north China these years.

A. Million of     B. Millions of     C. Several millions

( )48. — How long has he ____ this book?

— For several days.

A. borrowed      B. borrowing     C. kept

( )49. Tom grandma’s been to the Great Wall twice, ____?

A. does she       B. doesn't she     C. hasn't she

( )50. ____of the surface (表面) of the earth is covered with water.

A. First third       B. Two thirds     C. One there

B：完形填空。