单项选择题

A．Scientists have studied them for centuries.
B．They were meat eating as well as plant eating.
C．They wandered the earth for millions of years.
D．They lived on land, in the sea, and in the sky.
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单项选择题
A．Their competitors have long been advertising on TV.B．TV commercials are less expensive.C．Advertising in newspapers alone is not sufficient.D．TV commercials attract more investments.
A．Their competitors have long been advertising on TV.
B．TV commercials are less expensive.
C．Advertising in newspapers alone is not sufficient.
D．TV commercials attract more investments.
单项选择题
From the first paragraph we learn that the travel industry.
A．is going to give money to aid poverty
B．has improved its revenue
C．is financially healthier than ever
D．is better able to help reduce poverty than ever
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