新六级直击考点---综合改错题十

练习题

1 They know that the inside of the earth is very

hot, but they are not sure what causes the great heat.

Some scientists now believe that much of heat 1.__________

inside the earth is provided by the radioactive

elements.

2 Communications satellites have made it possible

for an entire world be closer than ever before. 2.__________

3 A lighthouse must be high enough for its light to

be seen far away, but if it is too high, it has more

possibility to be destroyed by high wind; so it

is always true to say that the higher it is better. 3.__________

4 Scientists have suggested that supersonic

aircraft may disturb the upper atmosphere to

such extent that dangerous radiation from the 4.__________

sun might reach the earth.

5 Nowadays, higher education does not make

as much difference to the jobs women take as

it does in case of men. 5.__________

6 More than 90 percent of cigarette smoke is

made up of about dozen hazardous gases, 6.__________

carbon monoxide being the most important.

7 Primates are also known for their great

intelligence, related in a part to their great 7.__________

awareness of the environment plus the ability

to manipulate this environment

8 This tendency of technology to make workers

superfluous but at same time allowing 8.__________

their numbers to grow so large is deceasing

psychological tensions.

9 Most of the dollar differences stem from fact 9.__________

that women tend to be more recently employed

and have fewer years on the job.

10 This island is to south of North Korea. 10.__________