TEST SIX 30.he planned this experiment yesterday,but he didn’t find time to do so .
问题描述：
TEST SIX 30.he planned this experiment yesterday,but he didn’t find time to do so .
TEST SIX
30.he planned this experiment yesterday,but he didn’t find time to do so .
A)to have made
B)to make
C)making
D)to do
答
首先plan to do是固定搭配
然后这件事是从yesterday开始plan的.是从过去开始到现在.并还会延续下去（这是完成时的定义）.所以用完成时.