“Tell me what__this time yesterday,”the teacher said to the boy.

问题描述:

“Tell me what__this time yesterday,”the teacher said to the boy.
A was happened B was happening C has taken place D was occuring

B was happening .因为句后有this time具体时间点,故用过去进行时.
关于D我可以这样解释吗,occur的现在分词是双写r.