___ many times, he finally understood it.
| A．Told |
| B．Telling |
| C．Having told |
| D．Having been told |
The professor advised us to think outside the box and to________ new, different, or unusual solutions．
| A．put up with | B．come up with |
| C．keep up with | D．catch up with |
—Hi．Danny! Are you going for a picnic this weekend?
—I’m not sure._____________．
| A．It all depends | B．Yes．I’d like to |
| C．Sounds good | D．Sorry，I can’t |
________to give up smoking，he threw away his________ cigarettes．
| A．Determined；remained | B．Determined；remaining |
| C．Determining；remained | D．Determining；remaining |
It is because English is being widely used at present_________．
| A．why we learn it hard | B．that we learn it hard |
| C．which we must learn | D．when we should learn |
You will see this product made in this factory________ wherever you go．
| A．to be advertised | B．advertised | C．advertise | D．advertising |