---Why didn’t you arrive there until three days later?

----Beccause the heavy rain _____the diffculities of the jurney.

A．added

B．added to

C．was added

D．was added to

卵巢癌的高危因素不包括（）。

A.卵巢恶性肿瘤家族史

B.未育

C.高胆固醇饮食

D.子宫内膜癌史

E.宫颈癌