He had hardly reached home _______ an unexpected guest came to visit him.
A．then B．when C．the moment D．than
Had they known what was coming next, they ___________ second thoughts.
A．may have B．could have C．must have had D．might have had
I don’t know how it ___________ that our car was bumped from behind.
A．let out B．gave out C．got about D．came about
—How do you like your trip to Hainan?
—________,I enjoyed it very much，although the weather was hot sometimes.
A．In addition B．On the whole
C．In other words D．On the other hand
-----Why didn’t you ring me up?
----- Sorry, I forgot your phone number. Otherwise, I _____ long before.
A．had rung you up B．must run you up
C．would have rung you up D．would ring you up
My chest _____ when I take a deep breath, doctor.
A．hurts B．wounds C．harms D．injure
