6. The flexibility of film allows the artist _______ unstrained imagination to the animation of cartoon characters.

A.to bring

B.brining

C.is brought

D.brings

7.Although the lecture had already been on for five minutes，I still was not able to find a chair____.

A. to sit

B.for to sit on

C.to sit on

D.for sitting

8. Surely her daughter would make an even bigger effort ______ her?

A.please

B.pleased

C.to please

D.having pleased

9.Lots of empty boots were found under the old man’s bed. He must have done nothing but ______.

A. drink

B. to drink

C. drinking

D. drunk

10.The local health organization is reported ___ twenty-five years age when Dr. Adudon became its first president.

A. to be set up

B. being set up

C. to have been set up

D. having been set up