Mother told Jim to watch the milk until it boiled and then _________ off the gas.

With exports ______ a big role in its economic growth, China has been affected by the current financial storm.

The young man, ______ several attempts to beat the world record in high jumping, decided to have another try.

Their room was on the first floor, its broad window _______ the central park.

The water in this glass is too hot. I prefer some cold______ water.

With more people ____ the traffic rules, our city is becoming better organized．

I’d like ___ on a trip to Tibet while he prefers ___ to Guilin．

The thief spoke in a _____ voice and the little boy was very ____．

Tell the children ______ there not to make so much noise．

We don’t allow _______in the office．But you are allowed _____ in the rest room．