________ seems to be a strong competition in China for senior high students to enter college or university.
Had they known what was coming next, they ___________ second thoughts.
I don’t know how it ___________ that our car was bumped from behind.
—How do you like your trip to Hainan?—________,I enjoyed it very much,although the weather was hot sometimes.
-----Why didn’t you ring me up?----- Sorry, I forgot your phone number. Otherwise, I _____ long before.
My chest _____ when I take a deep breath, doctor.