单项选择题

Which commercial usage of the Internet does the author NOT refer to

A．Buying airline tickets.
B．Trading stocks.
C．Paying bills.
D．Opening a bank account.
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单项选择题
According to the passage, which of the following groups of numbers will certainly bring good luck to people
A．3 and7.
B．3 and9.
C．7 and 9.
D．3 and 13.
单项选择题
What is the author's attitude towards people's superstitious beliefs
A．He is mildly critical.
B．He is strongly critical.
C．He is in favour of them.
D．His attitude is not clear.
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