Nancy a bus to school, but now she rides a bike.
A、is used o taking
B、was used to take
C、used to take
________ the girls in our class ________ over twenty.
| A．A number of, are | B．The number of, are |
| C．A number of, is | D．The number of, is |
We planted _______ trees last year.
| A．hundreds of | B．hundred of | C．five hundred of | D．five hundreds of |
The ________ of the island was quite an event in the world.
| A．discover | B．discovery | C．discovered | D．discoveries |
My smother ________ the e-mail invitation, but she realized she had forgotten to invite John.
| A．sent out | B．sent up | C．sent to | D．send out |
He is a very unfriendly man, so few people ________ at his party last Sunday.
| A．showed up | B．showed off | C．showed in | D．on show |