问几道英语定语从句的题

问几道英语定语从句的题
please remind me ___ he said he was going.I may be in time to see him off.
A.where B.when C.how D.what
-It's thirty years since we last met
-but i still remember the story,believe it or not,___we got lost on a rainy night
A.which B.that C.what D.when
Nobody believed his reason for being absent from the class___he had to meet his uncle at the airport
A.why B.that C.where D.because
这几题选什么