The limited supply of water has been put into practice, take care to turn off the running ____ before you leave.
| A．radio | B．traffic lights | C．gas | D．tap |
______ frightened us ______ a tiger turned up suddenly in front of us.
| A． What; was that | B．What; was | C．It; that was | D．It was; that |
The boys ______ the newspaper on the ground and began to read the news and articles in it.
| A．extended | B．expanded | C．spread | D．stretched |
Now that she is out of a job, Lucy ______ going back to school, but she hasn’t decided yet.
| A．had considered | B．is going to consider |
| C．has been considering | D．considered |
It is in their ability to speak ______ humans ______ from animals.
| A．which; differ | B．that; different |
| C．that;differ | D．which;different |
—How about your travel?
—You can hardly imagine what difficulty we have had ______ the vast desert.
| A．explored | B．exploring | C．to explore | D．explore |