I don't think ___ possible to master a foreign language without much memory work.
| A．this | B．that | C．its | D．it |
How did all these _________?
| A．came out | B．come up | C．come across | D．come about |
They lived a hard life and were often made _______ for over ten hours a day.
| A．work | B．to work | C．to working | D．worked |
_____ of the students who took part in the military training is 450.
| A．A number | B．A lot | C．Lots | D．The number |
The sales _____ steadily, the factory needs an increasing supply of raw material.
| A．have gone up | B．are going up | C．gone up | D．going up |
We prefer to measure our football team’s success _____ the number of fans attending rather than the number of games won.
| A．in addition to | B．in terms of | C．in honor of | D．in response to |