单项选择。
I know you don't like him,but please make _____effort to be polite.
A. a B. an C. the D. /
B
This black schoolbag doesn't belong to _____. Maybe it's .
A. mine;Fred B. me;Fred's C. mine;Fred's D. me;Fred
B
There is a strange _____ in the kitchen. I think the meat has gone bad.
A. voice B. smell C. noise D. taste
B
—How old is the man under the tree?
—I _____ him to be about fifty.
A. guess B. suppose C. understand D. know
B
—Where is my bike? I put it here just now.
—Don't worry. Maybe somebody rode it away .
A. by the end B. by the way C. by accident D. by mistake
D
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