—What do you think we can do for our aged parents？
—You do anything except that you visit them as often as possible.
| A．don’t have to | B．oughtn’t to | C．mustn’t | D．shouldn’t |
All the preparations for the task ________，and we're ready to start.
| A．completed | B．complete |
| C．had been completed | D．have been completed |
Selecting a mobile phone for personal use is not an easy task because technology ________ so rapidly.
| A．is changing | B．has changed |
| C．will have changed | D．will change |
Visitors ________ not to touch the exhibits.
| A．will request | B．are requested |
| C．are requesting | D．request |
—Sorry，sir，your car isn't ready yet.
It ________ by our workers.
—Oh，my God，when can I come to fetch it?
| A．is repaired | B．has been repaired |
| C．is being repaired | D．will be repaired |
If their marketing plans succeed，they ________ their sales by 20 percent.
| A．will increase | B．have been increasing |
| C．have increased | D．would be increasing |