6. I’m old enough not to let my troubles to interfere with A B C D
my work. (2003年)
7. The ability _______ is very important for any speaker. (1999年)
A. to hear clearly
B. to be clearly heard
C. to hearing clearly
D. to being clearly heard
8. Judging from his manners at the party, he doesn’t seem ______ much education. (1997年)
A. to receive
B. to be receiving
C. to have received
D. to have been received
9. Some cities have passed laws that allow coal and oil ______ only if their sulfur硫黄 content is low. (2005年)
A. burning
B. to burn
C. being burned
D. to be burned
6. I’m old enough not to let my troubles to interfere with my work. (2003年)
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