21.The reason ____ we should learn a foreign language is very clear.

21.The reason ____ we should learn a foreign language is very clear.
a.when b.that c.why d.which
22.My new glasses cost me _____ the last pair that I bought.
a.three times b.three times larger than
c.three times as much as d.as much three times
23.The doctor’s mistakes in judgment __ _ the death of the patient.
a.resulted from b.resulted in
c.brought out d.broke off
24.September 10 is Teachers’ Day in China.That day _____ teachers.
a.to honor b.honor c.honors d.honoring
25.If we both leave,who will __________ the children?
a.take care b.take care of
c.take of d.take
26.He _____ his leg when he ran in a long distance race.
a.injured b.was injured c.has injured d.injuring
27.Every time you cough you may _____ others with germs.
a.infected b.infecting c.to be infecting d.be infecting
28.One book _____ a long time to read.Louis thought there must be a better way to read
a.takes b.took c.spends d.spent
29.Our university _____ over 30 colleges and departments.
a.is made up b.is made of
c.is made up of d.is made
30.The high rent of a house in the city keeps young people ______.
a.away b.of c.from d.in
31.This chair ______ here between the table and the fireplace.
a.gets b.becomes c.fits d.is fit
32.I forgot what I was going to say.Oh well,it will ____ me later.
a.come b.come up c.come up to d.come to
33.He won’t go on doing the job _____ he gets his salary raised.
a.unless b.if c.when d.after
34.He talked as if he _____ all the work himself,but in fact Tom and I did most of it.
a.did b.has done
c.would have done d.had done
35.Most athletes are _____ during their youth.
a.at their best b.to their best
c.on the best d.in the best
36.You will find it to your ______ to learn English before you visit the United States.
a.privilege b.advantage c.advance d.profit
37.A good student is eager to learn and does not need to be ______ about being absent too much.
a.questioned b.asked c.warned d.persuaded
38.Confidence and hard work will _______ success.
a.lead to b.led to
c.lead in d.led in
39.September 10 is Teachers’ Day in China.That day ____ teachers.
a.to honor b.honor c.honors d.honoring
40.The 2008 Olympic Games will be held ____ August in Beijing.
a.on b.at c.for d.in