Examination compositions, together with most business letters and government reports, are the main situations ____ formal language is used.
#72137
A
in which
B
on which
C
of which
D
for which
推荐题目
 He fell off the bike ________.
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A
while he rode
B
while he was riding
C
while he is riding
D
while on bike
 I like the book so much that I'll buy it, _______. 
#67565
A
no matter how it may cost
B
how may it cost
C
how much may it cost
D
however much it may cost