. She _____ on this essay for twenty minutes but she has written only about a hundred words.
| A．will be working | B．worked | C．has been working | D．will have worked |
The person sitting opposite _____ Mr．Smith is our new manager．
| A．to | B．/ | C．with | D．of |
I’m not a teacher in this school．I _____ until a new teacher arrives．
| A．am just helping out | B．could just help out |
| C．just help out | D．have just helped out |
The scientists are urging that the chemical _____．
| A．is banned | B．should ban | C．be banned | D．must be banned |
“Changes should be made in the prison for the conditions there are _____,” said the reporter．
| A．wonderful | B．awful | C．elegant | D．awesome |
Mr．Smith was very glad _____ as the manager of the company．
| A．being appointed | B．having appointed |
| C．to have appointed | D．to have been appointed |