An assembly line(装配线) worker becomes tired ______ the same tasks over and over for eight hours.
A. of performing
B. with perform
C. to perform
D. in performing
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Many a boy ______ playing basketball.
A. likes
B. like
C. to like
D. have liked
Babies vary greatly as to the age ______ they began to talk.
A. which
B. in which
C. what
D. at which
If you want to be a good ______, you must understand your job well.
A. student
B. employee
C. calculator
D. device
The more Bill worked on the arithmetic problem, ______.
A. he became more confused
B. he confused more
C. the more confused he became
D. more he became confused
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