Please remain __________ until the plane has come to a complete stop.
| A．to seat | B．to be seated |
| C．seating | D．seated |
_______ we _______ the new policy for economy, we would never have bought the house.
| A．If ; predicted | B．Did; predict |
| C．If; have predicted | D．Had; predicted |
If you _______ just wait for a moment, I’ll try to find your papers.
| A．must | B．may | C．would | D．need |
Riding a bicycle can be fun. But _______ you ride a bike to work, and then there isn’t one to ride home?
| A．how come | B．what if | C．no matter how | D．wherever |
We consider it necessary that a plan _______ before doing the work.
| A．is made | B．will be made | C．should be made | D．made |
China is the world’s largest cigarette market, _______ over 30% of the total world consumption.
| A．accounting for | B．adding up to |
| C．consisting of | D．contributing to |