There are 51 students in Class Three, _____ failed in the test.
| A．all of which | B．all of them | C．none of whom | D．none of them |
you should go on trip to Italy with us because you won’t get second chance.
| A．the; a | B．the; the | C．×；a | D．×；the |
This is the hotel ________ last month.
| A．which they stayed | B．at that they stayed |
| C．where they stayed at | D．where they stayed |
What________ the public was that Phelps should take drugs.
| A．worrying | B．worried |
| C．was worried | D．was worried about |
The Red Army soldiers had to fight________ all kinds of difficulties in their fight________ the people’s freedom.
| A．for；for | B．with；with |
| C．against；against | D．against；for |
Some people fear that ________ air pollution may bring about changes in ________ weather around the world.
| A．/；the | B．the；/ | C．an；the | D．the；a |