He works in a factory now, but he on a farm for 20 years.
| A．worked | B．has worked | C．had worked | D．had been working |
So long as Peter goes all out to do the work, I don't mind how long it _____ him to complete it.
| A．took | B．will take | C．take | D．takes |
—This book is ______ more useful for us students.
—Yes, but it is _____ too difficult.
| A．quite; quite | B．much; rather | C．rather; quite | D．quite; much |
It is required that each of the students chosen _____ good preparations ahead of time.
| A．has to make | B．will make | C．should make | D．must make |
My hard work ____. My cartoon came out in the form of a real book, beautifully printed.
| A．paid off | B．paid for | C．paid back | D．paid out |
— I've never found a better job.
—____.
| A．I don't think so | B．Too bad | C．Congratulations | D．Don't worry |