Something must be done to prevent our city ____ by thick smoke.
| A．to be polluted | B．from polluting | C．from being polluted | D．polluting |
—What’s the central idea of the passage，Bob?
—Sorry，I can’t make________of it.It’s beyond my ability.
| A．judgement | B．understanding |
| C．idea | D．sense |
This is the first time we________a film in the cinema together as a family.
| A．see | B．had seen |
| C．saw | D．have seen |
Jane’s pale face suggested that she______ill，and her parents suggested that she________a medical examination.
| A．be；should have | B．was；have |
| C．should be；had | D．was；has |
In April，thousands of holidaymakers remained________abroad due to the volcanic ash cloud.
| A．sticking | B．stuck |
| C．to be stuck | D．to have stuck |
“Things________never come again！” I couldn’t help talking to myself.
| A．lost | B．losing |
| C．to lose | D．have lost |