Two trees have been planted along the lake since 1998.A. thousands ofB. thousand ofC. tho

问题补充：

Two trees have been planted along the lake since 1998.

A. thousands of

B. thousand of

C. thousands

D. thousand

答案：

A. thousands of

B. thousand of

C. thousands

(答案→)D. thousand

解析：英文中表示数量的单词（如hundred，thousand）表示具体量时不加s，直接加名

词，本题有数字two，有名词trees，故选D,表示两千棵树的意思。