單項選擇題There are many cities（）very fast.

A.expand
B.which expand
C.which expanding
D.to expand


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1.單項選擇題Just over 70% of people（）for the survey said the net had become essential.

A.questioning
B.questioned
C.question
D.to question

2.單項選擇題There are often advertisements（）to other websites on the Internet.

A.lead
B.led
C.leading
D.to lead

3.單項選擇題Are you interested in（）sport?

A.over-road
B.on-road
C.away-road
D.off-road

4.單項選擇題What's the（）difference between the two parties?

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

5.單項選擇題He tried to hack（）the banking system.

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