—How long does Kitty spend on her homework?—________.
Could you tell us ______?
Can you find out the differences ____ the first picture____ the second picture?
Wow! _______ beautiful Ping Liang is!
---The book is on Lily’s desk. _______it is hers. --- No, it _______ Lucy.
--- Can you tell me why you learn English so well? --- It’s very simple. ______ you study, _______ grades you will get.