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单项选择题
A.energy
B.source
C.power
D.material
单项选择题
A.Wow, you got the idea.
B.No, never mind.
C.Pretty well, I guess.
D.Sorry, I'm new here
单项选择题
A.sings
B.sang
C.has sung
D.is singing
单项选择题
A.What a pleasure
B.It's pleasure
C.I'm very pleased
D.Pleased to meet you