( )6.The book is _______a good cook. A. to B. and C. about
—May I _____your bike? ----Sorry.
There are twenty_____in our school. Some of them are____.
---____did she go to Beijing?---You won’t believe it! On foot.
--____will you come back? ----In an hour.
I ___the blackboard, but I can’t ______a word.