_____________they visited the Science Museum, they showed great interest in everything they saw．
| A．The first time | B．For the first time |
| C．At first | D．At the first time |
Nowadays certain limit should be set on use of cars to reduce air pollution.
| A．/; the | B．a; the | C．the; / | D．the; the |
---What’s your favorite sport?
----Skiing.__________.
| A．I get a kick out of it | B．I prefer it |
| C．I choose it | D．I’m used to it |
We were cut off from the outside world by the sudden flood; what’s worse, our food _______.
| A．was run out | B．was running out | C．has run out of | D．has been run out |
______ well prepared you are, you still need a lot of luck in mountain climbing.
| A．However | B．Whatever | C．No matter | D．Although |
----Did you look up the time of the high-speed trains to Shanghai?
----Yes, the early train is __________ to leave at 5:30 a.m.
| A．likely | B．possible | C．due | D．about |