---Do you often go swimming in summer?

---No, _________.Swimming is a good kind of sports, but I can’t swim.

A．sometimes

B．often

C．always

D．never

可用于治疗青光眼的药物为（）

A.普萘洛尔

B.噻吗洛尔

C.吲哚洛尔

D.阿替洛尔

E.拉贝洛尔