单项选择题


Questions 19 to 21 are based on the conversation you have just heard.

A．It bills the customer once a month.
B．It’s a kind of ATM cards.
C．It’s a kind of credit cards.
D．It takes out the money from the customer’s bank account.
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填空题
According to the passage, color blindness can be dangerous in certain occupations like ______.
单项选择题
A．People can use nearly 75 percent of it.B．People can use about 97 percent of it.C．People can use exactly 3 percent of it.D．People can use less than 3 percent of it.
A．People can use nearly 75 percent of it.
B．People can use about 97 percent of it.
C．People can use exactly 3 percent of it.
D．People can use less than 3 percent of it.
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