单项选择题

A．They might eventually cause to lose sleep.
B．They help produce a neurotransmitter in the brain.
C．You must not drink milk if you take them.
D．They make it unnecessary to take naps.
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单项选择题
A．Nothing.B．To check out books from the library.C．To see a movie and write a paragraph.D．To read the next chapter in the textbook.
A．Nothing.
B．To check out books from the library.
C．To see a movie and write a paragraph.
D．To read the next chapter in the textbook.
单项选择题
A．People are more selfish.B．People are more destructive.C．People don’t have moral principles to follow now.D．People do what they preach now.
A．People are more selfish.
B．People are more destructive.
C．People don’t have moral principles to follow now.
D．People do what they preach now.
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