They are visiting the park ______. （   ）

A．now

B．next Sunday

C．last night

（题文）I am ________ a letter ________ my aunt. (　　)

A．writing; at

B．write; to

C．writing; to

用动词正确形式填空：be ( are, am, is)
1. I_____ (be) doing homework now.
2. Mike and John ______ (be) drawing pictures.
3. Amy ____ (be) reading a book.
4. We are __________ (write) an e—mail.
5. Zhang Peng is _________ (listen) to music.
6. They _____ (be) _____________ (answer) the phone.

用进行时态用所给词造句：They, eat rice. _______________________________

He’s riding his bike, but it’s ________to rain. (  )

A．starting

B．start

C．starts