____ she couldn’t understand was ____ fewer and fewer students showed interest in her lessons. A.What; because B.That; what C.What; why D.Why; that k+s-5#u
答案:C 解析: 本题考查主语从句和表语从句。第一空作understand的宾语,所以用what。 why与because都可引导表语从句,但why从句说明结果,because从句说明原因。