1、四级英语活用 51.Lung cancer, like some other cancers, often doesnt produce _ until it is too late and has spread beyond the chest to the brain, liver or bones.A) trailsB) therapiesC) symptomsD) symbols2.With the increasing unemployment rate, workers who are 50 to 60 years old are usually the first to be _
2、.A) laid offB) laid asideC) laid outD) laid up3.The physical differences between men and women can be _ directly to our basic roles as hunters and child-bearers.A) pursuedB) tracedC) switchedD) followed4.It is clear that the dog has a much greater _ of its brain devoted to smell than is the case wit
3、h humans.A) compositionB) compoundC) percentD) proportion5.American college students are increasingly _ with credit card debt and the consequences can be rather serious.A) boostedB) burdenedC) dischargedD) dominated第一题:trail:n. 踪迹,小径,尾;v. 拖,尾随,追踪therapy:n. 治疗symptom:n. 病症，症候，征兆，表征symbol:n. 象征，符号，标志
4、第二题：lay off:解雇;停止做lay aside:把.搁置一旁;储存lay out:安排,布置;摆出,展开lay up:使卧床不起 第三题：pursue:v.追捕,追求,继续从事trace:n. 踪迹，痕迹；vt. 跟踪，追踪;追溯,探索;临摹switch:n. 开关，突然转变；v. 改变，交换follow:vt. 跟随，追赶，沿着前进，仿效；vi. 跟随，紧接 第四题：devote:vt. 将奉献(给)，致力于composition: n. 作文,著作,组织compound:n. 混合物,复合字;a. 复合的,混合的,合成percent: n. 百分比,百分数proportion:n. 比例，率，份儿，部分，均衡，调和；vt. 使成比例，使均衡 第五题： increasingly:ad. 日益地，愈加地consequence:n. 结果，后果boost:n. 推进,支援;v. 推进,提高burden:n.重负,负荷;重担 v.使负重,装载;加重压于,烦扰discharge:v. 领土,版图)
