单项选择题

Which group of the following are acronyms？（）

A.VOA、AIDS、BASIC、D-Day
B.CORE、Laser、TEFL、NATO
C.G-man、BBC、BASIC、NATO
D.TV、ID、TB、UFO

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单项选择题

A.in
B.on
C.about
D.with

单项选择题

A.see his parents in Italy
B.see a doctor when he's ill
C.visit his friends during holidays

单项选择题

A.never works on Saturdays and Sundays
B.often works on Saturdays and Sundays
C.works every weekend