Feathers are very light, we say "as light as a feather".
A．in case B．unless C．if D.so that
I have a lot before the exam so I can't watch too much TV now．
A.to be done B.doing C.to do D．do
There is no doubt our educational system leaves something to be desired．
A.what B.whether C.if D.that
Before writing your answer, please give careful __ to the question．
A.consideration B.translation C.examination D.expression
Helping others is a habit, you can learn even at an early age
A.it B.which C.what D．that
—How much do I owe you for lunch?
— .It ' s nothing．
A.You're welcome B.Not at all C.Forget it D.That's right
