-Look! A man is standing on his two hands.-Yes. It seems he_____ for long.A. practiced B. has practiced C. was practicing
--- May I go now? --- No. You ______________ let the teacher know first.”
--What do you think of the EXPO 2010? --- It’s great, of course. people are going to Shanghai for the EXPO 2010.
---Do you know Lisa’s address? ---No, she didn't tell me ________________.
---You are quite different from your sister. ---Yes. We are both short. But my eyes are ________ than ________.
---The sick kids look unhappy. What shall we do? --- Let's do something to ___________.