I really appreciate____ to help me with my maths, but I’m afraid that I have no time this week.
| A．you to offer | B．it you offer |
| C．your offering | D．this you are offering |
British scientists have produced ___ they believe is the world's smallest Christmas card．
| A．which | B．who | C．that | D．what |
The big fire in Shanghai, believed to ___ due to the burning of construction materials, caused 58 deaths and destroyed all the belongings of the people there．
| A．have occurred | B．occur |
| C．have been occurring | D．be occurring |
A teacher's ___ to education is worth great respect of the whole society because it brings benefits to the development of society．
| A．devotion | B．principle | C．identity | D．guidance |
—What do you think of the American singer Lady Gaga?
—Too crazy, but if she ___ come to China to hold concerts, I would buy tickets for her live show．
| A．would | B．could | C．should | D．might |
___ more and more people may refer to the Internet for the latest news, it is unlikely that the newspaper will disappear．
| A．When | B．Because | C．Since | D．While |