The infrastructure of a country is makes everything run smoothly， including things like transport， irrigation， electricity， postal service， telephones and schools.
#69516
A
that
B
what
C
which
D
as
推荐题目
The World Expo 2010 is being held at a time the world is looking for a new kind of balance between nature and cities．
#69967
A
when
B
where
C
which
D
that
She’s asked me_______ to build the church.
#74273
A
how long it was taken
B
how long it had taken
C
how much time did it take
D
how much time it was taken
---- Is it high time that we _____ on the school building? ---- Yes, it _____.
#73483
A
do some repairs; is
B
do some repair; is
C
did some repairs; is
D
did some repair; was
We went through a period______communications were very difficult in the rural areas.
#74469
A
wtach
B
whose
C
in which
D
with which
There are several research centers in China ________ a certain disease called Bird Flu is being studied.
#73321
A
which
B
where
C
when
D
what