What are they _______?  (    )

A．doing

B．do

C．does

This is Liu ______. (   )

A．speak

B．to speak

C．speaking

下列每组单词中，选出不同类一项。
（    ）1. A. birthday    B. play     C. watch
（    ）2. A. twelfth     B. twentieth C. twenty
（    ）3. A. her B. him   C. their
（    ）4. A. under     B. behind   C. be
（    ）5. A. swimming   B. sing C. playing

写出下列单词的正确形式。
1. dance(现在分词)---___________  2. sing(现在分词)---____________
3. doll(复数形式)---_____________  4. take(现在分词)---____________
5. old (反义词)---______________   6. cook(现在分词)---___________

选词填空
skiing   work   shop    tomorrow
--Time to go home, class! See you (1) _____morning.
--Bye!
--Would you like to go (2) _______ with me this afternoon, Danny?
--Yes! I'd love to, but I need to call my mother first.
--She is working now.
--Where does she (3) _______?
--She is a clerk. She works in a shop.
--Do you know the phone number of the (4) ________ ?
--I think so.