问题
选择题
183. --- You look pale, what troubled you?
--- I ______ my dead friend.
A．am thinking about
B．was thinking about
C．had thought about
D．will think about
答案
B
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183. --- You look pale, what troubled you?
--- I ______ my dead friend.
A．am thinking about
B．was thinking about
C．had thought about
D．will think about
B