---English has a large vocabulary, hasn’t it?
---Yes. more words and expressions and you will find it easier to read and municate.
A. Know
B. Knowing
C. To know
D. Known
网友回答
(答案→)A. Know
B. Knowing
C. To know
D. Known
解析：考查固定句型：祈使句+and/or+简单句，并列关系用and，转折关系用or，句意：--英语有很多词汇量，是吗？-是，了解更多的单词和短语，你会发现它更容易读和表达。选A。