单选题When I tried to find

问题补充：

单选题WhenItriedtofind_________thatpreventedsomanypeoplefromtakingpartintheprogram,itseemedtomethatthereweretwomainreasons.A.why it didB.that it didC.what it wasD.why it was

答案：

C解析本题是强调句和宾语从句的考查。宾语从句缺少主语，用what。强调句中强调部分为疑问副词应提前，故选C项。