Why are dogs friendly to humans?
A. Because dogs are friendly by nature.
Because humans are friendly to them.
C. Because dogs like to be taught how to do things.
D. Because humans bred wild dogs into friendly ones.
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What is special about cats?
A. Cats choose humans.
B. Cats care if humans are happy.
Cats refuse to come near humans.
D. Cats are interested in learning things.
What is one of the differences between cats and dogs?
A. Cats want to be close to humans.
B. Cats want to make humans happy.
C. Dogs regard humans as their equals.
Dogs regard humans as their masters.
用于焊接过程中，预热区，焊接区，冷却区氮气保护，杜绝焊点或铜箔高温下氧化，提高焊点质量是设备里抽风系统的功能。
A. 对
B. 错
What is one country in the Middle East trying to do?
A. Create a new government.
B. Make its citizens happier.
C. Make the world people happy.
D. Create a new office in the government.
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