You won’t feel happy at school________you get on well with your classmates．
| A．though |
| B．when |
| C．unless |
| D．because |
The old man makes a living driving a taxi.
| A．on | B．to | C．for | D．by |
If you don’t know a word, you mustin a dictionary.
| A．look it up | B．look up it |
| C．look over it | D．look it out |
is really hard them to climb Mount Huang.
| A．This, to. | B．It, for |
| C．This, for | D．It, to |
下列字母书写格式正确的是 ____。
A. 
B.
C. 
下列哪组字母含有相同发音音素？
A. F H B. G J C. N X