单项选择题

The phrase "close his options" in the last paragraph means "（）".

A．change the topic
B．get too close to you
C．make a decision.
D．limit his choice

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单项选择题
Which of the following statements is supported by the passage（）

A．Do-it-yourself burglar systems are not as effective as those professionally installed.
B．Burglars alarm systems for home use have just recently been made available.
C．There are more burglar alarm systems in homes today than there were a few years ago.
D．Burglar alarm systems for the home will not prevent entry by a professional burglar.
单项选择题
In the past, people did not have security alarm systems installed in their homes, because（）

A．security alarm systems were not safe at all
B．security alarm systems were easy to break down
C．security alarm systems were not available
D．security alarm systems required complicated wiring techniques, individualized design, and sometimes lots of carpentry
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