问题
选择题
Every year, _____people go to visit their factory
A. a thousand of B thousands C. thousand of D. thousands of
答案
答案：D
考查数词。数词hundred, thousand, million等后面跟of时，要变复数。排除C。thousand前接具体数字时，后面不能跟of，排除A。thousands后要加of，排除B。
