19世纪初期，英国古典经济学的杰出代表人物是（）.
A.西斯蒙第
B.李嘉图
C.萨伊
D.马尔萨斯
参考答案：A
用所给单词的正确形式填空。
1．Mrs. Green was tired after her ________(day) work.
2．Excuse me. Where is the ________(man) Room?
3．There are two ________(library) in the city.
4．The ________(key) to the doors are on the table.
5．This exercise is ________. I can do it ________(easy).
自我激励不可以使我们（）。
A.悲观地看待人生
B.激发自己认真思考
C.提高效率
D.藐视困难
