My favourite festival __________Thanksgiving Day. (   )

A．is

B．are

C．was

改错： This are my red cat.
__________________________

看图，填入适当的单词完成句子。（每空填一个单词）
1. She _______ reading.
2. He is _______ basketball.
3. He is playing ________.
4. She is playing the ________.

I ________ a student.  (   )

A．is

B．am

C．are

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.