--- I dropped in at your house at about ten last night, but you weren’t in.
--- I ______ regular exercises at the club.
| A．did | B．was doing | C．had done | D．have been doing |
___ help the people in the snowstorm in the south made him worried．
| A．Not known how to | B．Unknown what to do to |
| C．His knowing not how to | D．His not knowing how to |
Written in a hurry, ___________．How can it be satisfactory?
| A．they find many mistakes in the report | B．lots of mistakes have been made in the report |
| C．there are plenty of mistakes in the report | D．the report is full of mistakes |
The students expected there ______ more reviewing classes before the final exams．
| A．is | B．to be | C．being | D．have been |
The woman, who is said to have moved to America last year, ____ in China for almost twenty years．
| A．lived | B．has lived | C．was living | D．had lived |
The company promised to pay some money for the customers __ ___ their shoddy（伪劣的）goods and ______ an apology in public．
| A．purchasing ; making | B．purchasing; make |
| C．purchased; to make | D．to purchase; made |