It was the hard work and determination of the generation _____ had changed the opinion of people towards Chinese.
| A．why | B．when | C．that | D．which |
It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it．
| A．when; which | B．when; that |
| C．that; which | D．that; that |
We should think carefully about ______ Mr. Needham said at the meeting.
| A．that | B．what | C．which | D．/ |
Have you ever met with this case in your life you can't understand others even if they have said something several times？
| A．where | B．what | C．that | D．which |
Only ____ as a translator _____ how important it is to understand foreign cultures.
| A．when did I work; I realized |
| B．when I worked; I realized |
| C．when did I work; did I realize |
| D．when I worked; did I realize |
Cao Cao’s tomb is reported ______ in China, which attracts nationwide attention.
| A．being found | B．to be found |
| C．having been found | D．to have been found |