21Willpower is a kind of quality, _____ is _____ it takes to do anything well.
A.what; which
B.what; what
C.which; which
D.which; what
开始考试练习点击查看答案22Engines are to machines ____ hearts are to animals.
A.as
B.that
C.what
D.which
开始考试练习点击查看答案23The new research center will be set up _____ was a wasteland 20 years ago.
A.in what
B.where
C.in which
D.there
开始考试练习点击查看答案24He doesn"t think the question of ______ they are boys or girls is important .
A.if
B.whether
C.which
D.that
开始考试练习点击查看答案25It is not always easy for the public to see _____ use a new invention can be of to human life.
A.whose
B.what
C.which
D.that
开始考试练习点击查看答案26The free tickets will go to _____ comes first to the concert.
A.whoever
B.whomever
C.whichever
D.no matter who
开始考试练习点击查看答案27After _____ seemed an endless wait, it was his turn to have the interview.
A.what
B.that
C.when
D.which
开始考试练习点击查看答案28A big earthquake struck southem Haiti, knocking down buildings and power lines and causing _____ its ambassador to the United States called a catastrophe.
A.what
B.which
C.that
D.why
开始考试练习点击查看答案29____ makes her different from other students is that she likes being alone.
A.Which
B.That
C.What
D.Whatever
开始考试练习点击查看答案30When the audience heard the alarm, they all hurried to ____ they thought was an emergency exit door.
A.what
B.which
C.where
D.who
开始考试练习点击查看答案