All of my classmates have __________ fond of the new teacher since he came to teach us.
| A．gone | B．become |
| C．changed | D．had |
Last Sunday, I went shopping for the perfect dress, ______ would make me look younger.
| A．one in which | B．the one in which | C．one that | D．the one that |
In an experiment, pet owners are being encouraged to take their pets to work, a move _______ can be good for both the people and the pets.
| A．that some scientists say | B．in which some scientists say |
| C．some scientists say that | D．some scientists say |
They will fly to Washington,they plan to stay for two or three days.
| A． | where | B． | there | C． | which | D． | when |
10. We went through a period _____ communications were very difficult in the rural areas.
| A．which | B．whose | C．in which | D．with which |
13.For many cities in the world, there is no room to spread out further, _______ New York is an example.
14.
| A．for which | B．in which | C．of which | D．from which |