The government has considered________ many steps ________the environment free from pollution.
| A．to take; to protect |
| B．taking; to keep |
| C．to have taken; stopping |
| D．having taken; preventing |
We prefer__________alone rather than__________.
| A．staying; go out | B．staying; going out |
| C．to stay; to go out | D．to stay; go out |
This is my dear teacher without_________help I couldn’t have passed that difficult exam.
| A．who | B．whom | C．whose | D．That |
Mr. Black _______Shanghai in a few days. Do you know when the earliest plane _______ on Sunday.
| A．leaves; takes off | B．is leaving; takes off |
| C．is leaving; is taking off | D．leaves; is taking off |
I’ll never forget the day_________ we spent happily together
| A．when | B．which | C．on which | D．where |
We’ve booked a room in the centre of town for the guests _____ they can stay for three days.
| A．when | B．whom | C．which | D．where |