Helen always sends __________ emails to her friends.(  )

A．an

B．a

C．some

用所给词的适当形式填空。（10分）
（1）There ____________(not be）any cats in my house .
（2）Lucy usually ________(fly）a kite on Sundays.
（3）My grandparents _________(have）a lot of friends in China .
（4）Miss White is a ____________(write）.
（5）I often play with ____________ (he）in the park .
（6）Do you like _________(swim）in summer ?
（7）I can skate very ___________ (good）.
（8）How many _________ (people）are there in your family ?
（9）The art room is on the ________ (one）floor of the building .
（10）Aunt Wang can ________ books .She’s a __________ .(write)