____ is good _______ your health.
| A．Walk, to | B．Walking, to |
| C．To walk , with | D．Walking, for |
——May I take the book out of the reading room?
—— No, you can’t. You ________ read it here. It’s the rule.
A. must B. may C. need
—— Did you notice the headmaster just now?
—— No, I of something else.
A. thought B. was thinking C. have thought
当你在野外发生意外，急需援救时，你应该打出什么信号？
A．SOS B. UFO C.WTO
下列哪组字母发音音素相同？
A. FH B.GJC. NX
下列哪个既是字母又是单词？
A. C B. I C. U