I am struggling to polish up my English now. If only I _______ hard in senior on

题干

I am struggling to polish up my English now. If only I _______ hard in senior one!

A．study

B．studied

C．had studied

D．should study

上一题下一题 0.65难度单项选择更新时间:2019-02-03 12:16:51

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