I ___________along the pavement yesterday when some strangers came up and asked me the way to the police station.
| A．is wandering | B．was wandering | C．has wandered | D．had wandered |
—Hey，John！I________to meet you here.
—Oh，yes.This is my first time to be at the Internet café.Do you often come here?
| A．haven't expected |
| B．wasn't expecting |
| C．hadn't expected |
| D．didn't expect |
ln the struggle of fighting against _______ nature, _______ man created itself.
| A．the; the |
| B．/; / |
| C．a; the |
| D．/; the |
It is suggested that the key _______ the world's environment should be _______ a low carbon economy right now.
| A．to protect; to expand |
| B．to protecting; to expand |
| C．of protecting; expanding |
| D．to protect; expanding |
This washing machine is environmentally _______ because it uses less water and electricity than older models.
| A．friendly |
| B．various |
| C．common |
| D．changeable |
AII the companies had to _______ their expenses in response to the financial crisis.
| A．add up to |
| B．cut back on |
| C．look out for |
| D．refer back to |