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单项选择题
A. have, to
B. having, from
C. to have, from
D. have been to
单项选择题
A. referring
B. covering
C. regarding to
D. as for
单项选择题
A. to
B. of
C. with
D. in
单项选择题
A. if
B. whether
C. upon
D. at
单项选择题
A. to raise
B. having raised
C. rise
D. having risen
单项选择题
A. Meanwhile
B. While
C. However
D. Whether
单项选择题
A. for your reply reaches us
B. for your reply reaching us
C. to our receiving your reply
D. to your reply reaching us
单项选择题
A. which
B. as
C. what
D. for which