单项选择题
A．3,000 B．300 C．3,000,000 D．30,000
A．told about their houses B．entertained C．silly D．very worried about their houses
A．200,000 acres in about 15 hours B．about 1,333 acres in about 1 hour C．about 3,000 acres in 2 hours D．70 miles in more than 15 hours