几道语法改错题！！

都是2004－8月上的：

19.Art Deed, a style of design popular in the 1920's and the 1930's,was used primarily

in furniture, jewel, textiles,and interior decoration.

答案选c,单数可数名词不能单独存在，可是b答案我觉得也不对啊，应该是popular design！

28. Paleoanthropologists examine fossil remains fo extinct primates,while physical anthropologist concern with ethology study the behavior of primates in their natural settings

答案选b，是不是改为 are concerned with??

39 By 1810 the 23 towns of Hampshire Country,Masachusetts,had reached a remarkable uniform of economic development as well as population density.

答案选d,我觉得该选c！

40 With more than half the world's annual yield of 50 million tons of soy beans, an important source of protein, is grown in the United States.

答案选a，错在哪里呢 ？？？

19.答案选c,单数可数名词不能单独存在，可是b答案我觉得也不对啊，应该是popular design！

可以这么用，习惯用法。

28. 答案选b，是不是改为 are concerned with??

concerning

39 答案选d,我觉得该选c！

C->unification

40 答案选a，错在哪里呢 ？？？

with 多余，去掉。