She may have missed the train, she won’t arrive for another hour.
| A．in that case | B．in this case |
| C．by which case | D．in which case |
It is vital that we _____ act out at once to protect the environment.
| A．would | B．should | C．will | D．can |
—Any information about your son?
—No. If only I ______ those tough words to him.
| A．didn't say | B．hadn't said |
| C．shouldn't have said | D．couldn't have said |
---Your sister nearly _______ all her spare time to her study during the three years.
----That's right， or she ________ the first place in her school in the College Entrance Examination.
| A．devoted; wouldn't have taken | B．spent; wouldn't have taken |
| C．had devoted; hadn't taken | D．had spent; couldn't take |
Zhang Lin was addicted to computer games during his last year in high school , otherwise he ____________a student of Beijing University .
| A．would have been | B．should be | C．has been | D．had been |
It has been many years since I was last in London ＿＿I still remember something that happened during that visit.
| A．and | B．for | C．but | D．as |