It is __________ to say "thank you" very often，even to family members.（ ）
A．politeB．rudeC．dangerousD．humorous
Kelly White loves all sports， __________skating．（ ）
A．graduallyB．seriouslyC．especially
Only plants and animals that need very little water __________live in a desert．（ ）
A．canB．needC．must
It's hard to turn down a banana． They taste good and you don't have to wash them __________eating them．（ ）
A．untilB．afterC．before
Thanks for letting us borrow your camera． We __________it to you next Monday．（ ）
A．returnB．will return
C．have returned
Do you want tea or coffee？
__________is OK． I really don't mind．（ ）
A．NeitherB．BothC．Either