问题
选择题
Li Ming is said ______ the experiment in the lab, but I can’t find him there.
A．to have done
B．to do
C．to be doing
D．doing
答案
答案：C
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Li Ming is said ______ the experiment in the lab, but I can’t find him there.
A．to have done
B．to do
C．to be doing
D．doing
答案：C