单项选择题

A．By asking some students to explain the reason.
B．By giving them a test on the speed of sound.
C．By using a vivid question to check them.
D．By asking the students to restate his words.
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单项选择题
A．An economic policy of a country.B．An economic policy of a family.C．TV programs designed for a family.D．A birth control policy of a country.
A．An economic policy of a country.
B．An economic policy of a family.
C．TV programs designed for a family.
D．A birth control policy of a country.
单项选择题
A．Because they are sister and brother.B．Because they lost connections for a long time and he wants to keep in touch with her.C．Because they are best friends.D．Because Mike wants some advice from Sue for job interview.
A．Because they are sister and brother.
B．Because they lost connections for a long time and he wants to keep in touch with her.
C．Because they are best friends.
D．Because Mike wants some advice from Sue for job interview.
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