All that I have to do______to boot up my laptop and download more songs from iTunes.A.isB.
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All that I have to do______to boot up my laptop and download more songs from iTunes.
A.is
B.are
C.was
D.were
请帮忙给出正确答案和分析,谢谢!
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正确答案:A
主谓一致题。代词all作主语,表示物时,谓语动词应用单数形式;表示人时,谓语动词应用复数形式。thatIhavetodo是定语从句,用来修饰先行词all,并不能影响主句谓语动词的单复数,但通过该定语从句的时态可知主句应用现在时,故选项[A]为答案。
