2. 外语
  3. The student did his homework ______ his professor had assigned.

The student did his homework ______ his professor had assigned.

admin2012-07-22  33
问题 The student did his homework ______ his professor had assigned.
选项 A、when
B、as
C、until
D、if
答案B
解析 本句意思是这学生按照教授的布置，做好了家庭作业。
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