Half of the books ________easy for the students to read．
| A．are | B．is | C．am | D．be |
When I went to say goodbye to Anna, shethe piano.
| A．is playing | B．plays |
| C． was playing | D．played |
---Whose desk is that?
---It’s desk.
| A．Tom and Kate’s | B．Tom’s and Kate’s |
| C．Tom’s and Kate | D．Tom and Kate |
Kunming is famous its nice weather. I will go there to spend the summer holiday.
| A．in | B．as | C．for | D．with |
He’s been to the Great Wall,?
| A．is he | B．does he | C．hasn’t he | D．has he |
We believe scientists will a way to solve the problem of air pollution.
| A．set off | B．put off |
| C．come up with | D．catch up with |