问题：
— English has a large vocabulary, hasn"t it?
— Yes, _____ more words and expressions and you will find it easier to read and communicate.
[ ]
A. Know
B. Knowing
C. To know
D. Known
— English has a large vocabulary, hasn"t it?
— Yes, _____ more words and expressions and you will find it easier to read and communicate.
B. Knowing
C. To know
D. Known
— Yes, _____ more words and expressions and you will find it easier to read and communicate.
[ ]
A. Know B. Knowing
C. To know
D. Known
参考答案：