Environment is to us what water is to fish—on no ______ can we live without it!
On Christmas Eve, our tree was decorated with shining ______, such as colored lights and glass balls.
We had a good time there, and the food was plentiful and very ______.
As the road was blocked by a rock, the travelers had to ______ up a rocky slope on their way back.
The TV station has hired more than 65 people to get its Washington,D.C.operation ______.
A．off the ground
B．on the ground
Mary became ______ homesick, so she fled from her home in L.A. to her hometown in Austria.
It seems somewhat______ to expect her to marry a man who she barely knows about for money.
On the road motorists should be aware of cyclists and be ______ towards them.
The Copenhagen conference is looking to agree on a(n)______ that will be built on the current Kyoto Protocol.
Please ______ from smoking until the airplane is airborne.