I can' t keep______ the teacher who speaks so fast.

A.lost 　　B.missed 　　C.failed 　　D.dropped

A.point 　　B.speak 　　C.talk 　　D.tell

A.in favor of 　　B.by favor of　　C.in favor to 　　D.out of favor

A.keep you waiting 　　B.having kept you waiting

C.waiting for you 　　D.keep you wait

A.women do as much work as men

B.people think women are weaker than men

C.sport is easier for men than for women

D.in sport the two sexes are always together

A.What would life be like without memory ?

B.Memory is of vital importance to life.

C.How is a person' s memory different from an animal' s or a computer' s?

D.What is contained in memory ?

A."in connection with" B."expressed by"

C."consisting" D."by means of"

A.only human beings have problem-solving intelligence

B.a person' s memory is different from a computer' s in every respect

C.animals are able to solve only very simple problems

D.animals solve problems by instincts rather than intelligence

A.the computer' s memory has a little bigger capacity than a teenager' s

B.the computer' s memory capacity is much smaller that an adult human being' s

C.the computer' s memory capacity is much smaller even than a teenager' s

D.both A and B

A.the basis for decision making and problem solving

B.an ability to store experiences for future use

C.an intelligence typically possessed by human beings

D.the data mainly consisting of words and combinations of words