Here is a survey about hopes and dreams ______ thousands of students took part.
| A．at which | B．in which | C．with which | D．about which |
Living in the central Australian desert has its problems, _____ obtaining water is not the least.
| A．of which | B．for what | C．as | D．whose |
— Where _____ the recorder? I can't see it anywhere.
— I _____ it right here. But now it's gone!
| A．did you put; have put | B．have you put; put |
| C．had you put; was putting | D．were you putting; have put |
— I didn't tell my parents the secret yesterday.
— But you ______.
| A．ought to do | B．ought to | C．should | D．ought to have |
In 1911, Madame Curie received a second Nobel Prize for her research, the first person in the world ______ two Nobel Prizes.
| A．receiving | B．received | C．to receive | D．being received |
A 16-year-old male student had been infected with bird flu in Hunan province , the fourth case of human bird flu found in China.
| A．committed | B．confirmed | C．convinced | D．considered |