As we have planned, we’ll go to Beijing to attend her sister's wedding party. We'll also visit our mother school _____ we go there.
| A．unless | B．when | C．once | D．even if |
_______is known to us all is that the 2016 Olympic Games will take place in Rio de Janeiro.
| A．What | B．which | C．As | D．It |
--May I use your mobile phone? ---_________.
| A．Why not? | B．OK, enjoy yourself | C．Go ahead | D．You’d better not. |
Many more policeman should be sent to ________them ________some endangered animals.
| A．prevent; to hunt | B．stop; hunting | C．keep; to hunt | D．keep; hunting |
______ we have got the chance, we’d better make full use of it.
| A．Now that | B．After | C．As long as | D．As soon as |
---The traffic was so heavy, you know. ---Does that ________the serious accident?
| A．account for | B．deal with | C．explain for | D．care for |