____ he was in poor health, he worked just as hard as everyone else.

A. But             B. Although              C. Even if        D. If

The number of the employees has grown from 1,000 to 1,200. This means it has risen ____20 percent.              

A. by                        B. at                C. to                      D. with   

____ the students likes the paintings. Which is wrong?

A. The teacher as well as  B. Nobody but C. The teacher besides D. All except

We left Xi' an _.___ a very hot summer afternoon.

A. on                    B.in                C. during        D.by

Fresh air is good ____ your health.          

A.at                         B.for                      C.of            D.to

Of the two sisters, Betty is_______ one, and she is also the one who loves to be quiet．

A．a younger           B．a youngest       C．the younger    D．the youngest

--- ______ that he managed to get the information?

--- Oh, a friend of his helped him.

A. Where was it      B. What was it   C. How was it      D. Why was it

It is ______ any wonder that his friend doesn’t like watching television much. 

A. no             B. such        C. nearly         D. hardly

_______to take this adventure course will certainly learn a lot of useful skills.

A.Brave enough students                   B.Enough brave students

C.Students brave enough                   D.Students enough brave

After the new technique was introduced，the factory produced ___ tractors in 1988 as the year before.

A. as twice many　　B. as many twice　 C. twice as many　   D. twice many as