__________we get on well with a number of people，we are usually friends with only a few．
| A．While | B．Since | C．If | D．As long as |
She concentrated her energies __________ her test.
| A．on |
| B．to |
| C．with |
| D．of |
My deskmate and Tom are similar __________ each other __________ character.
| A．in；to |
| B．to；in |
| C．to；of |
| D．in；as |
The company,__________ in 2003, is one of the most famous compa-nies.
| A．founded |
| B．found |
| C．founding |
| D．to found |
—How often do you eat out?
—__________，but usually once a week.
| A．Have no idea |
| B．It depends |
| C．As usual |
| D．Generally speaking |
I was so familiar with him that I recognized his voice __________ I picked up the phone.
| A．while |
| B．after |
| C．in case |
| D．the moment |