The manager said to the employees at the meeting that everyone must___their attention to efficiency
| A．concertrate |
| B．focus |
| C．pay |
| D．fix |
I had just settled in the new place and didn’t know ____________________.
| A．what to expect | B．what to be expected |
| C．how to expect | D．how to be expected |
In fact, I wonder _________ my efforts were all in vain.
| A．that | B．which | C．why | D．where |
Cloning plants is straightforward while cloning animals is _____________ more complicated.
| A．very | B．far | C．fairly | D．quite |
The doctor recommended that you ____________ swim after eating a large meal.
| A．wouldn’t | B．couldn’t | C．needn’t | D．shouldn’t |
Only a small percentage of the graduates ___________________ a job.
| A．have been offered | B．have offered | C．has been offered | D．has offered |