His Selected Poems ______ first published in 1986.
A. were
B. was
C. has been
D. is
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抗菌药物青霉素的效价单位是
A. L
B. μl
C. mg
D. U
E. μg
Dean and Carolyn always put small presents in ______ stockings on Christmas Day.
A. each other's
B. each other
C. each others
D. each others'
The ______ is just around the comer and you won't miss it．
A. bicycle's shop
B. bicycle shop
C. bicycles shop
D. bicycles' shop
It seems to me that what Lucy saw and heard ______ very interesting.
A. was
B. were
C. is
D. are
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