单项选择题

Questions 18 ～ 21 are based on the following monologue. How long did she teach minority students

A．8 years.
B．20 years.
C．16 years.
D．30 years.
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单项选择题
A．shouldB．mayC．willD．must
A．should
B．may
C．will
D．must
单项选择题
In which month do you think Ellen went to Bangkok
A．February.
B．April.
C．August.
D．November.
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