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01

These results must be accurate,bacause all the calculations have been done by an _ computer.

A.electric

B.electricity

C.electrical

D.electricity

答案：B

02

He has changed his _ about buying a new house at least five times.

A.mind

B.head

C.brain

D.thought

答案：A

03

_ the important meeting,I would have gone to your graduation party.

A.In case of

B.But for

C.Due to

D.Because

答案：B