问题
选择题
They all looked at the man surprisedly. No one knew what ______.[ ]
A．is happening
B．has happened
C．was happening
D．have happened
答案
答案：C
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They all looked at the man surprisedly. No one knew what ______.[ ]
A．is happening
B．has happened
C．was happening
D．have happened
答案：C