It is difficult for us to learn a lesson in life _____ we’ve actually had that lesson .
| A．until | B．after | C．since | D．when |
Peter was so excitedhe received an invitation from his friend to visit Chongqing.
| A．where | B．that | C．when | D．why |
Itbe difficult to get a train ticket during traditional Chinese Spring Festival this year because there are many ticket windows.
| A．mustn't | B．ought to | C．needn't | D．can't |
—Do you mind if I open the window?
—. I feel a bit cold.
| A．Go ahead | B．Of course not, it's not allowed here. |
| C．I'd rather you didn't | D．Why not? |
He is going to build a team that has a lot of potential and he thinks that isexcites him.
| A．that | B．which | C．what | D．as |
They waited at the bus stop and about five minutes later the bus they wantedalong.
| A．coming | B．came | C．to come | D．had come |