问题
选择题
Last week the students did the experiment in order to_______ if iron rusts in dry air.
A.look for
B.look at
C.find out
D.find
答案
答案:C
短语辨析. A. 寻找 B. 看 C.找出;查明 D. 发现.句意:为了查明铁是否在空气中生锈,上周这些学生们做了这个实验.选C.