24，In this passage，doctors think that teenagers should eat more ____．

A． food with no vitamins

B． fat and sugar

C． vegetables and fruits

D． salt and oil

[单选题]Why do the American doctors think of using laser light to treat heart disease?A．Beeause laser light is quite powerful．B．Because laser light is penetrating．C．Because laser light can destroy the blocking materials in human’s artery．D．Because laser ligh

[单选题]The author of this passage intends to tell us ________.(A) the important role IT managers play(B) the advantages IT managers should have(C) the qualifications IT managers possess(D) the high salaries IT managers earn

[单选题]Passage FourMost people do not think of fishes and other sea animals as having voices, and of those who are aware of the fact that many of them can "speak", few understand that these "conversations" have significance. Actually, their talk may be

[单选题]24． The passage tells us __________．A． the sun is not the biggest starB． the sun is bigger than any other starC． only the sun can shineD． the sun is one of the farthest stars from us

[单选题]24． The main idea of this passage is that __________．A． we should do something helpful to other peopleB． we should pick somebody up when his car is brokenC． we shouldn't accept money as a thank-youD． we shouldn't give somebody a ride in a bus

[单选题]24． We can learn from the passage that ．A． flying to Tibet is impossibleB． train to Lhasa is too clean to takeC． train trip to Tibet is popular with travelersD． taking train to Lhasa causes a lot of trouble

[单选题]The joke about doctors implies that, in the eyes of nurses, they areA． impolite to new arrivals.B． very conscious of their godlike role.C． entitled to some privileges.D． very busy even during lunch hours.

[单选题]The present campaigns that doctors have begun are______.A． to save or rescue more than two million peopleB． to reveal the fight between doctors and mosquitoesC． to support the WHO's effects in destroying mosquitoesD． to kill all malaria-bearing mosq

[单选题]D．octors say that exercise is important for health, but it be regular exercise .A． can B. will C. must D. may

[单选题]D．octors say that exercise is important for health, but it _______ be regular exercise.A．canB．willC．mustD．may