单项选择题

The second paragraph is mainly about ______.

A．the wheel in transportation
B．the roller in transportation
C．animals in transportation
D．very heavy loads
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单项选择题
The main idea of the first paragraph is that ______.
A．people traveled on lakes thousands of years ago
B．people used logs thousands of years ago
C．traveling was hard thousands of years ago
D．there were no roads and cars thousands of years ago
单项选择题
You are wanted on the phone.
A．你想有部电话。
B．有你的电话。
C．你被电话需要。
D．你需要接电话。
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