which is the best answer ? why?
I didn't hear my cell phone ring.I -- turned it on.
a.must not have
b.could have
c.should not have
Search from various English teachers...
Answers · 2
0
A
0
A
I didn't hear my cell phone ring.I must not have turned it on.我没听到手机响，我一定是没有开机
I didn't hear my cell phone ring.I could have turned it on.我没听到手机响，我可能是开机了
I didn't hear my cell phone ring.I should not have turned it on.我没听到手机响，我不应该开机。
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