[单项选择]Every human being, no matter what he is doing, ______ body heat.
A. keeps up
B. puts off
C. takes in
D. gives off

[单项选择]Every human being, no matter what he is doing, ______ body heat.
A. keeps up
B. puts off
C. takes in
D. gives off

[单项选择]In what sense is the average human being unable to "think"

[单项选择]What is true about a human being in the future

[单项选择]What may be human being's best choice about its future, according to the passage

[单项选择]What was Edwards doing when he was struck by the lightning
A. Hiding from the rain under a tree.
B. Driving a ear.
C. Taking a walk.
D. Lying on the ground in muddy water.

[单项选择]Jack told Mary that he ______ what he was doing during the vacation.
A. had just been asked
B. has just asked
C. was just asked
D. just asked

[单项选择]The young boy usually eats what he wants （）what he needs.
A. because of
B. instead of
C. such as

[单项选择]It was what he meant rather than what he said ______ annoyed me.
A. which
B. as
C. what
D. that

[单项选择]What he says and what he does ______ not agree.
A. are
B. do
C. has
D. does

[单项选择]The longest time a human being can survive without sleep is probably ______ .
A. five days
B. seven days
C. ten days
D. twelve days

[单项选择]The writer thinks human being's leaving the stage can be any of the following but __________.

[单项选择]Every plant, animal, and human being needs water to （）alive.
A. stay
B. make
C. run
D. glow

[单项选择]If human being want to enjoy the long-lasting peace and happiness, they must avoid falling into war and live in ______ with each other.
A. coincidence
B. harmony
C. uniform
D. alliance

[单项选择]

Can you imagine who on earth is our human being’s most dangerous enemy -- The rats!
Men are the cleverest and most ’dangerous animals on earth. Rats come second. Men kill their enemies. They have killed millions of men since ancient times -- but rats have killed hundreds of millions of men. Rats carry diseases. Black rats carry fleas, and these fleas give men bubonic plague. Bubonic plague still kills thousands of Asians and Africans today as it killed millions of Europeans in the past until brown rats came to Europe and pushed the black rats out. There is no plague in Europe today, but brown rats carry thirty-five other diseases typhus for example. Typhus has killed 200 million people in the last 400 years. Rats are dangerous.
They not only carry diseases into men’s homes, they also take men’s food. They eat 33 million tons of grain every year. That is enough to feed 200 million people -- so men die of hunger because rats eat their
A. we should think out good ideas to kill rats
B. we should rather leave the earth than kill the rats
C. rats with diseases are the most dangerous enemy of human beings
D. rats bring about horrible diseases