--- Do you know the reason _________ pilots turn off the plane’s lights before taking off?
---The practice is for the passengers to adjust to the dark _________ an emergency.
| A．why; for fear that | B．for which; in case of |
| C．how; for fear of | D．that; in case |
As the light turned green, I stood for a moment, not _____, and asked myself what I was going to do.
| A．moved | B．moving | C．to move | D．being moved |
__ it to clear up tomorrow, the tourists would climb to the top of the mountain to see the sun __.
| A．If; to raise | B．Were; rise | C．Should; rise | D．If; raising |
.It is the third time that our water supply _______during the day.
| A．was cut out | B．has been cut off | C．has been call off | D．was cut down |
With all the things he needed _______, he went home happily.
| A．bought | B．buying | C．to be bought | D．to buy |
As a heavy smoker , he finds it hard to get rid of the habit, which has a bad _____on his health.
| A．affect | B．effect | C．effort | D．affection |