elephant is heavier than horse.
A. /,/
B. An,the
C. An,a
D. /,the
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It took me hour and half to finish work.
A. a,a,a
B. an,a,a
C. an,a,the
D. an,a./
Shutdoor, please.
A. a
B. an
C. the
D. /
We often have sports after class,and I like to play basketball.
A. a
B. an
C. the
D. /
We work five day week.
A. a
B. an
C. the
D. /