Having lived in China for 8 years, Helen has a good ____________ of both English and Chinese.
Three-fourths of the buildings ______.
That’s the new machine _______ parts are too small to be seen.
----Everybody is going to climb the mountain. Can I go too, mom? ---- __________ Wait till you are old enough, dear.
.Just be patient. You ________expect the world to change so soon.
----Have you finished reading Jane Eyre? ---- No. I _____ my homework all day yesterday.