You should save your work often as a（）against computer failure.

单项选择题If a man is easily taken in by emotional traps, he will not be able to make（）judgments.

A.sensitive
B.sentimental
C.sensible
D.sensational

单项选择题It is a type of desert bush that can （） extremes of temperature.

A.adapt
B.withdraw
C.withstand
D.shade

单项选择题Since many insects have already become（）to DDT, scientists have to look for some new insecticide

A.active
B.resistant
C.tough
D.gradual

单项选择题His parents no longer worry about him. He has a good job and can live（）his own now.

A.at
B.by
C.on
D.with

单项选择题He（）the medicine quickly and then drank some orange juice.

A.sucked
B.swallowed
C.licked
D.digested

单项选择题While studying he was financially dependent （）his wife.

A.to
B.of
C.on
D.from

单项选择题The water was so（）that we could see the fish inside clearly.

A.transparent
B.obvious
C.apparent
D.visible

单项选择题As I had earlier made up my mind to run for governor, I could not（）I must go on with the fight.

A.vary
B.withdraw
C.undergo
D.discard

单项选择题The medicine the doctor gave me（）my headache.

A.reduced
B.improved
C.released
D.relieved

单项选择题Many people save money to（）for their old age.

A.supply
B.offer
C.provide
D.yield