—Shall we meet at six o'clock?

—We had better meet a little late. Let's_______seven o'clock.       [ ]

A. to make it at  

B. to make it  

C. make it at    

D. make it

以下哪种疾病能通过性行为传播？（）

A、子宫肌瘤

B、滴虫性 * * 炎

C、卵巢囊肿