By the time Jack returned home from England, his son from college.
| A．graduated | B．has graduated | C．had been | D．had graduated |
Mary ought to attend school this autumn, but she ______ up early in the morning.
| A．isn’t used to get | B．isn’t used for getting |
| C．used not to get | D．isn’t used to getting |
----Will you go shopping now?
---- Not until I _______ my experiment.
| A．have finished | B．will finish | C．finished | D．am finishing |
------I’m worrying about my coming examination.
------Well, you will succeed in the end _______ you work with a strong will.
| A．unless | B．as long as | C．as if | D．even if |
The magazine I like best _________ once a month.
| A．comes on | B．comes off | C．comes in | D．comes out |
With the old man ______ the way, we had no trouble in finding the village.
| A．show | B．to show | C．showing | D．shown |