—Oh, Tom, what did you do this summer vacation?

—Guess what? I had _____ great fun in _______ show performance “the Voice of China”.

A．a, the

B．the, the

C．/,a

D．/, the

女性尿路感染最常见的途径是（）

A.直接感染

B.下行感染

C.逆行感染

D.淋巴感染

E.血行感染