Don't be joking. It's time to____________ your business.
| A．set out | B．take up | C．go on | D．get down |
. The doctor was so kind that he devoted all his spare time he had _______the poor boy.
A. to helping B. helped C. helping D to help
Tom said he did not mind what time I arrived at his place____I promised to go and help him.
| A．on condition that | B．so far | C．as well as | D．as good as |
Yao Juan is the only one of the students who_________to be praised.
| A．are | B．have been | C．is | D．has been |
The experts advise______our army_________modern weapons.
| A．to equip; with | B．equipping; with | C．to equip;for | D．equipping; for |
This year they have produced_________ they produced the year before last.
| A．twice many cars as | B．twice as many cars as |
| C．twice more than cars | D．twice the cars of |