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TEST SIX 30.he planned this experiment yesterday,but he didn

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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
TEST SIX 30.he planned this experiment yesterday,but he didn
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.