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
—Thank you.
—____
A. You’re welcome.
B. That’s OK.
C. A and B.