题目：
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.
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：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.
