用括号里单词的适当形式填空
1. When I am ________ (do) my homework, my mother is ________ (cook).
2. He has to _________ (travel) the country in search of work.
3. How __________ (do) seeds travel?
Seeds _________ (travel) in many ways.
4. What _____ (be) they talking about?
They are _________ (talk) about the seeds of plants.

— What ______ on the table? (　　) 
— It’s food.

A．be

B．is

C．am

Her brother _________ in Beijing. (   )

A．wasn’t

B．hasn’t

C．weren’t

We shouldn’t _____ late for school.

A．to be

B．are

C．be

选出不同类的一项。
(  ) 1. A. cat B. rabbit C.in
(  ) 2. A. monkey B. rabbit C. magic
(  ) 3. A. what B. store C. where
(  ) 4. A. are B.am  C. do
(  ) 5. A.isn’t B. aren’t C. is