问题
选择题
We usually have six lessons a day，and each of them__________45 minutes.
A．last
B．lasts
C．have
D．need
答案
B
each作主语，谓语动词用单数。
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We usually have six lessons a day，and each of them__________45 minutes.
A．last
B．lasts
C．have
D．need
B
each作主语，谓语动词用单数。