The five rings ____________the close unity and friendly meeting at the Olympics between athletes from five continents.
| A．prove | B．represent | C．defeat | D．explain |
He found his son________by letters and papers and________very worried.
| A．surrounding；looked |
| B．surrounded；looked |
| C．surrounding；looking |
| D．surrounded；looking |
________you may have，you should gather your courage to face the challenge.
| A．However a serious problem |
| B．What a serious problem |
| C．However serious a problem |
| D．What serious a problem |
I used to love that film________I was a child，but I don’t feel it that way any more.
| A．once | B．when |
| C．since | D．although |
There were some chairs left over________everyone had sat down.
| A．when | B．until |
| C．that | D．where |
She had just finished her homework________her mother asked her to practise playing the piano yesterday.
| A．when | B．while |
| C．after | D．since |