20.( )It's hard to keep the house _________with three kids.
A.cleaned B.to clean C.clean D.have cleaned
19.( )Don't worry! I'm sure I can run ___________ to catch .up with them.
A.fast enough B.enough fast C.enough slowly D.slowly enough
18.( )Which sigh tells you the way into a building?
A.EXIT B.PUSH C.PULL D.ENTRANCE
17.( )Sunglasses can protect our eyes _________the sunlight.
A.of B.from C.for D.to
16.( )There are ________students waiting in the hall,
A.hundreds of; aren't they B.four hundred; aren't they
C.four hundreds; aren't there D.hundreds of; aren't there
15.( )Why not change to CCTV-2? There is________ on.
A.important something B.important any-thing
C.something important D.anything important
14.( )She is wearing a dress _______silk.
A.made from B.made of C.make from D.make of
13.( )Jenny went out of the classroom ________saying a word. She was really angry.
A.with B.not C.without D.not