单项选择题
A.as result B.as a result of C.as the result of D.a result of
A.great advancesin B.a great advancein C.great advanceon D.a great advanceon
A.tell B.to tell C.telling D.to telling
A.were questioned B.who questioned C.who were questioned D.question
A.expand B.which expand C.which expanding D.to expand
A.questioning B.questioned C.question D.to question
A.lead B.led C.leading D.to lead
A.over-road B.on-road C.away-road D.off-road
A.essential B.necessary C.dominant D.great
A.to B.on C.into D.for
A.net B.website C.internet D.network