泳池浅水区水深不超过（）米。
A、1
B、1.2
C、1.5
D、1.8
参考答案：C
当你面向南时，右面是（ ）面。后面是（ ）面。
---English has a large vocabulary, hasn’t it?
---Yes._____ more words and expressions and you will find it easier to read and communicate.[ ]
A. Knowing
B. Know
C.To know
D. Having known
