Tom likes reading books when he ________.
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.
The baby is always crying. He _______ be hungry.