牛刀小试:用动词的适当形式填空。
Few students ______( ask ) to work hard at their lessons here, are they?
The police promised that they ______(solve) the case as soon as possible.
The school trip we look forward to ______(take) place this Saturday.
My parents didn’t go to the cinema with me, they ______ already______(fly) to America.
______(catch) up with  his friends, he ran as fast as he could.
China ______(send) up several spacecraft into space in the last few years.
The charity show ______(organize) by my classmates last year was a great success.
I’m sorry I didn’t catch what you said because I ______ (type) the letter.