It’s hot in the shopping mall, because the air-conditioning system ______.
| A．broke up | B．broke down | C．broke in | D．broke 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 |
---Have you received Jack’s plan?
---Yes, but I don’t think his plan is _____．
| A．worth being considered | B．worthy to be considered |
| C．worthy of considering | D．worth to be considered |
______ history of the Qing Dynasty is _____ history of suffering, also one of being bullied and invaded（欺侮和侵略）．
| A．不填; a | B．The; the | C．The; a | D．The; 不填 |