He smiled politely Mary apologized for her drunken friends. [ ]A. as B. ifC. unl
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He smiled politely ________ Mary apologized for her drunken friends. [ ]A. as
B. if
C. unless
D. though
试题答案
A
He smiled politely ________ Mary apologized for her drunken friends. [ ]A. as
B. if
C. unless
D. though
A