____ I should ask them some questionsa.Should they come to usb.If they come to us c.Were they come to us d.Had they come to us

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____ I should ask them some questionsa.Should they come to usb.If they come to us c.Were they come to us d.Had they come to us
____ I should ask them some questions
a.Should they come to us
b.If they come to us
c.Were they come to us
d.Had they come to us

____ I should ask them some questionsa.Should they come to usb.If they come to us c.Were they come to us d.Had they come to us
选B
if条件状语从句是主将从现,后面的should就表示将来时态

B

A