中级
单选题第20题选择：
A．on the plane
B．at the bank
C．at the airport
D．at the office
E．at the theatre
F．at the hotel
G．at the customs
H．on the bus
参考答案：A进入在线模考
根据原文“Here is the pill for air sickness．这是晕机丸”，可知场景为飞机上。
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1第21题选择：
A．on the plane
B．at the bank
C．at the airport
D．at the office
E．at the theatre
F．at the hotel
G．at the customs
H．on the bus
2第22题选择：
A．on the plane
B．at the bank
C．at the airport
D．at the office
E．at the theatre
F．at the hotel
G．at the customs
H．on the bus
3第(20)题答案是
A．focus on
B．account for
C．subject to
D．apply to
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