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单项选择题

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

A．In the middle of the semester.
B．At the beginning of exams.
C．At the end of the school year.
D．In the middle of summer vacation.
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单项选择题A．Cooking food.B．Boiling water.C．Killing bacteria.D．Generating electricity.

A．Cooking food.
B．Boiling water.
C．Killing bacteria.
D．Generating electricity.

单项选择题A．At a library.B．In a college bookstore.C．At a news-stand.D．At a department store.

A．At a library.
B．In a college bookstore.
C．At a news-stand.
D．At a department store.

单项选择题A．It will be better to say nothing to Paul.B．Paul himself will come to talk to them.C．The man should be the one to speak to Paul.D．The man should replace the radio before she talks to Paul.

A．It will be better to say nothing to Paul.
B．Paul himself will come to talk to them.
C．The man should be the one to speak to Paul.
D．The man should replace the radio before she talks to Paul.

单项选择题Which of the following is the unique characteristic of online education that traditional education doesn’t have

A．There are lectures, but they won’t be in person.
B．There are assignments, and you must hand them to your instructor.
C．If you get sick, you have to ask for someone’s notes.
D．If you get a phone call during class, you will miss something.