问题
选择题
It took us ________ to finish the experiment on the monkey
A．an hour or two
B．one or two hour
C．one and a half hour’s time
D．one hour and a half time
答案
答案：A
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It took us ________ to finish the experiment on the monkey
A．an hour or two
B．one or two hour
C．one and a half hour’s time
D．one hour and a half time
答案：A