单项选择题

We may infer from this passage that the whole set of World English consists of______ units.

A．ten
B．thirty
C．sixty
D．more than sixty

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单项选择题
This passage is probably taken from the______ of an English textbook.
A．contents
B．introduction
C．first chapter
D．index (索引)
单项选择题
The results of the test show that______.
A．breakfast has great effect on work and studies
B．breakfast has much to do with people's health
C．a person will work better if he has simple breakfast
D．breakfast only affects those who work with their brains
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