It was 80 years before Christopher Columbus crossed the Atlantic _____ Zheng He had sailed to East Africa.
| A．when |
| B．that |
| C．after |
| D．since |
You had better ____ some money for your daughter．
| A．pile out | B．set aside | C．give out | D．turn around |
I don’t know whether you happen ____ that he has been away for two months．
| A．to be heard | B．to be hearing | C．to hear | D．to have heard |
When the children are busy playing their games．They had better be _____
| A．let out | B．left out | C．left alone | D．left away |
The boy made ____ fun of me, so I became angry ____ him．
| A．a; with | B．/; with | C．a ; about | D．the; about |
There are many new bikes ____ for you in the shop．I think you can buy one that you like most．
| A．to be chosen | B．to choose from | C．to choose | D．for choosing |