It takes us ________ hour or more to go to my hometown by ________ train.
| A．an; a | B．a; an | C．a; / | D．an; / |
The fire spread through the hotel very quickly but everyone_____get out.
| A．had to | B．would | C．could | D．was able to |
Johnny, you_____play with the knife, you_____hurt yourself.
won’t/can’t B.mustn’t/may C.shouldn’t/must D.can’t/shouldn’t
—Could I call you by your first name? —Yes, you______
| A．will | B．could | C．may | D．might |
A computer_____think for itself, it must be told what to do.
| A．can’t | B．couldn’t | C．may not | D．might not |
—What were you doing when Tony phoned you?
—I had just finished my work and ___ to take a shower.
| A．had started | B．started | C．have started | D．was starting |