甲、乙两人在一幢楼房的三楼窗口比赛掷垒球，他们都尽力沿水平方向抛出同样的垒球，不计空气阻力，甲掷的水平距离正好是乙的两倍．若乙想水平掷出相当于甲在三楼窗口掷出的距离，则乙应（　　）

A．在5楼窗口水平抛出

B．在6楼窗口水平抛出

C．在9楼窗口水平抛出

D．在12楼窗口水平抛出

___ staying at hotels in Red River Village, tourists can help the villagers make money so that they

can take _____the river and the birds.

[      ]

A. By; care for

B. By; care of

C. Through; care about

D. With; care of