When asked to explain_______ he did to make his students so fasinated with his lessons, the teacher paused and thought deeply．
| A．what was it that | B．that what it was |
| C．what it was that | D．what was it |
We have every reason to believe that ______ 2012 Olympic Games in London will be ______ success.
| A．/; a | B．the; / | C．the; a | D．a; a |
---Oh dear! I’ve just broken a glass.
---Never mind. _____.
| A．It can’t be helped | B．You are so careless |
| C．You are welcome | D．Bad luck |
Those natives who _________ move from place to place with their animals in the past have moved into new houses at last.
| A．could | B． would | C． might | D．should |
— Have you ever visited the Opera House?
—Yes．When I was in Sydney, I ______ it twice．
| A．have visited | B．had visited | C．visited | D．would visit |
The traffic accident _________all his life. After that he was limited to a wheelchair.
| A．damaged | B．destroyed | C．harmed | D．ruined |