___________ the chapter four times, and I finally understand the author’s theory．
#94567
A
Reading
B
Having read
C
To read
D
Read
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If I try to correct someone, I have to do it with so much good humor and bright smile as if I were the one ______.
#96021
A
to have been corrected
B
correcting
C
having been corrected
D
being corrected
The teacher told us that everyone has an important role ________in protecting the earth from________.
#92087
A
to play; to pollute
B
to be played; to be polluted
C
to play; being polluted
D
to be played; being polluted
He was disappointed to find his suggestions ____.
#97317
A
been turned down
B
turned down
C
to be turned down
D
to turn down