问题
选择题
____ finishing his homework, he went to play basketball.
A．In
B．Upon
C．At
D．With
答案
答案：B
考查介词：Upon doing一做…,句意：一做完作业，他就去打篮球了。选B。
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____ finishing his homework, he went to play basketball.
A．In
B．Upon
C．At
D．With
答案：B
考查介词：Upon doing一做…,句意：一做完作业，他就去打篮球了。选B。