预研究氧氟沙星治疗细菌性感染的效果进行一临床试验，人选研究对象 228人，全部完成试验，其中180人治愈，30人有效，15人好转，3人无效。有效率为

A．1．3%

B．6．6%

C．13．2%

D．78．9%

E．92．1%

—Excuse me, could you tell me ________?

—There is a bank on the second floor. You can make it there.

A．where I can exchange money

B．how I can get to the bank

C．if there’s a bank near here

D．where the bank is