—How can we kill the time? There is about a quarter before the concert begins.

—_____ . I will like whatever you want to do.

A．All right

B．Up to you

C．It all depends

D．Take your time.

下列头孢氨苄无抗菌作用的是（）

A、溶血性链球菌

B、肺炎球菌

C、大肠杆菌

D、铜绿假单胞菌

E、奇异变形杆菌