A lot of research and studies have shown that Trench oil，taken out from kitchen waste，_____ the increase of cancers．
#168
A
results from
B
attends to
C
contributes to
D
devotes to
Unfortunately，when I dropped in，Doctor Li _____ for Beijing to join in the fight against bird flu so we only had time for a few words．
#169
A
just left
B
has just left
C
is just leaving
D
was just leaving
Rock-climbing is a breathtaking activity，very popular nationwide among young people，_____ cooperation as well as courage plays an important role．
#170
A
who
B
which
C
where
D
of which
When A Brief History of Time written by Stephen Hawking was published，the reactions of the public were quite different from _____ of scientific circles．
#171
A
that
B
it
C
those
D
ones
The voyages of travellers before the 17th century show that they were not _____ the sea even though they didn't have modern navigational aids．
#172
A
at the expense of
B
at the risk of
C
in the way of
D
at the mercy of
After a long journey，the whole Europe from north to south，they found themselves _____ out as well as their clothes．
#173
A
wear
B
wore
C
wearing
D
worn
_____ it is normal for parrots to talk，Einstein，a small bird，is unusual in that whenever she hears a new word or sound，she repeats it over and over until she masters it．
#174
A
As
B
When
C
While
D
Since
My friend's birthday is coming soon．I would like to go to _____ store，or some place close by to buy him _____ present．
#175
A
the；the
B
a；the
C
不填；a
D
the；a
Used to TV shows，where everything is quick and entertaining，many people do not have the _____ to read a book that requires thinking．
#176
A
courage
B
wisdom
C
patience
D
freedom
Several lawyers volunteer to speak _____ a 15-year-old boy who might be in trouble just because he helped a lady after she was knocked down by a motorcycle．
#177
A
at the mercy of
B
in terms of
C
in relation to
D
on behalf of
At present，the government must be very _____ about setting policies for the economical crisis and make no decision until they are quite sure it is the right one．
#178
A
particular
B
concerned
C
cautious
D
alternative
In other cultures，looking thin for a husband-to-be is not _____ a woman desires at all，but looking a little overweight is considered more attractive．
#179
A
which
B
whether
C
that
D
what
The successful sending-up of Tiangong-I on September 29th，2011 _____ an important step in our country's plan to build a space station．
#180
A
watched
B
took
C
followed
D
marked
With a shortened season，NBA players had to _____ their preseason training and get to know their new teammates and coaches sooner．
#181
A
make up
B
speed up
C
try out
D
work out
It is nice to see millions who had nothing but a record of misery and hunger _____ to improve their life and living conditions．
#182
A
having the chances
B
to have the chance
C
have the chance
D
had the chance
A campaign is being carried out to raise awareness _____ smoking is harmful to your health and quitting smoking early is good for your health．
#183
A
which
B
that
C
what
D
whether
During the reconstruction of the city，many modern tall buildings went up _____ old shabby houses were torn down．
#184
A
where
B
in what
C
in which
D
which
It was in the factory _____ his friend worked _____ he picked up a lot of experience．
#185
A
where；where
B
that；where
C
that；that
D
where；that
I feel uncomfortable each time I remember the situation _____ my brother didn't agree with me _____ the matter．
#186
A
where；to
B
that；at
C
which；about
D
in which；on
A team of mountaineers flew to Mount Everest to begin an expedition to clean up tons of trash that _____ on the massive mountain by its climbers．
#187
A
was left
B
has been left
C
had been left
D
has left