. It’s not ____ I won’t do it, _____ I can’t do it.

_____ a certain doubt among the workers as to whether he could finish the task in a short time．

“How about John?”“My uncle ______a good student．”         

．—________ have you been a reporter?
—For more than three years．

In our factory there are 2,000 workers, and two thirds of _______ are women.  

.---______?
------- That would be great! Please drop me off at the library.

一I’m sorry．That wasn’t of much help．
一Oh，____________．As a matter of fact，it was most helpful．

_________ going to the exhibition.

—Honest advice, though unpleasant to the ear, benefits conduct.
—I can’t agree more. _______.

— Why weren’t you at school yesterday morning,Li Lei?
—_________,sir.