單項選擇題

What's the（）difference between the two parties?

A.essential
B.necessary
C.dominant
D.great

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單項選擇題

He tried to hack（）the banking system.

A.to
B.on
C.into
D.for

單項選擇題

For more information, visit our（）at www.cambridge.org.

A.net
B.website
C.internet
D.network