单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．The water it draws changes color.
B．The straw stops drawing water.
C．From the built-in measuring device of it.
D．By measuring the amount of water.
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单项选择题
A．It makes the workers excited.B．It helps to reduce workers’ complaint.C．It makes workers spend less time having their dinner.D．It might make the production increase.
A．It makes the workers excited.
B．It helps to reduce workers’ complaint.
C．It makes workers spend less time having their dinner.
D．It might make the production increase.
单项选择题
A．Tsunamis are caused by underwater earthquakes.B．Earthquakes of about magnitude 6.75 on the Richter scale will cause tsunamis.C．Nearly 90 percent of underwater earthquakes cause tsunamis.D．Not all underwater earthquakes cause tsunamis.
A．Tsunamis are caused by underwater earthquakes.
B．Earthquakes of about magnitude 6.75 on the Richter scale will cause tsunamis.
C．Nearly 90 percent of underwater earthquakes cause tsunamis.
D．Not all underwater earthquakes cause tsunamis.
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