What are you  ? (    )

A．read

B．reading

C．reads

Why is she ________ her glasses? (  )

A．wearing

B．wear

C．wears

用所给词的正确形式填空。
【小题1】We should stop _________ (throw) rubbish into rivers.
【小题2】In the past, the Earth _________ (be) clean and beautiful.
【小题3】My brother is __________ (plant) trees in the backyard.
【小题4】The Earth __________(get) sick now.
【小题5】We shouldn’t __________ (cut) down so many trees.

(   )--- What are you doing, mum?
---I am（ ）picture.

A．look

B．looking

C．look at

D．looking at

用所给单词的正确形式填空
1. He often __________ (do) exercise.
2. Does he often __________ (do) high jump.
3. The 29th Olympic Games __________ (begin) on August 8, 2008.
4. Lily is __________ (play) chess with her father.
5. He always __________ (get) up early.