.To test which foods are better for a long space journey ,the astronauts in Shenzhou VI had as many as 50 dishes .

问题描述:

.To test which foods are better for a long space journey ,the astronauts in Shenzhou VI had as many as 50 dishes .
A.to choose B.to be chosen C.to choose from D.to be chosen from
为什么选C 不选A

将语句顺序进行调整:后半句--- the astronauts in ShenZhou VI can choose foods   "  from   "  as many as 50 dishes.   因此from不能省略!