单项选择题

A．Because whales keep a balance between plants and animals on land.
B．Because whales eat a lot of fish.
C．Because whales eat large amounts of garbage.
D．Because whales keep oceans clean for fish, and people need fish.
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单项选择题
A．They think that ice cream is very new.B．They know that ice cream is brought from Europe.C．They think that ice cream was an American idea.D．They don’t know what ice cream is.
A．They think that ice cream is very new.
B．They know that ice cream is brought from Europe.
C．They think that ice cream was an American idea.
D．They don’t know what ice cream is.
单项选择题
A．He gave Washington a horse as a present.B．He led a police officer to Washington’s house.C．He stole one of Washington’s horses.D．He broke into Washington’s house.
A．He gave Washington a horse as a present.
B．He led a police officer to Washington’s house.
C．He stole one of Washington’s horses.
D．He broke into Washington’s house.
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