Do you think the presidential election between Obama and Romney is worthy ?
| A．discussing | B．to be discussed | C．to discuss | D．being discussed |
On the ground _______ a sick goat, whose life was in danger.
| A．lay | B．lays | C．lying | D．laying |
The UK, which _______ Great Britain and Northern Ireland, is a country famous for its history.
| A．consisted of | B．consisting of | C．consists of | D．is consisted of |
---What made him so angry?
--- _______.
| A．Because his son escaped from school | B．His son’s escaping from school |
| C．His son escaped from school | D．What his son escaped from school |
Not until he left his home ______ to know how important the family was for him.
| A．did he begin | B．had he begun | C．he began | D．he had begun |
________ 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 |