问题补充：
There are visitors to the wetland park, and the number is becoming now.
A. thousand of; larger and larger
B. thousands of; more and more
C. thousands of; larger and larger
D. thousand of; more and more
答案：
A. thousand of; larger and larger
B. thousands of; more and more
(答案→)C. thousands of; larger and larger
D. thousand of; more and more
解析：句意：湿地公园有数以千计的游客，并且游客数量越来越大。表示确切数字，thousand不用复数，也不与of连用，表示概数必须用复数，并且连用of。说number的多少常用large和small，所以选C。
