cindy shut the door heavily and burst intoCindy shut the door heavily and burst into tears .No one in the office knew_____D____ she was so angry.A.where B.whether C.that D.why请问这个从句she was so angry.不也不缺成分吗,为何不用that?

问题描述:

cindy shut the door heavily and burst into
Cindy shut the door heavily and burst into tears .No one in the office knew_____D____ she was so angry.
A.where B.whether C.that D.why
请问这个从句she was so angry.不也不缺成分吗,为何不用that?