1.Lung cancer, like some other cancers, often doesn’t produce ________ until it is too late and has spread beyond the chest to the brain, liver or bones.
A) trails
B) therapies
C) symptoms
D) symbols
2.With the increasing unemployment rate, workers who are 50 to 60 years old are usually the first to be ________.
A) laid off
B) laid aside
C) laid out
D) laid up
3.The physical differences between men and women can be ________ directly to our basic roles as hunters and child-bearers.
A) pursued
B) traced
C) switched
D) followed
4.It is clear that the dog has a much greater ________ of its brain devoted to smell than is the case with humans.
A) composition
B) compound
C) percent
D) proportion
5.American college students are increasingly ________ with credit card debt and the consequences can be rather serious.
A) boosted
B) burdened
C) discharged
D) dominated
第一題：
trail:n. 蹤跡,小徑,尾;v. 拖,尾隨,追蹤
therapy:n. 治療
symptom:n. 病癥，癥候，征兆，表征
symbol:n. 象征，符號，標志
第二題：
lay off:解雇;停止做
lay aside:把...擱置一旁;儲存
lay out:安排,布置;擺出,展開
lay up:使臥床不起
第三題：
pursue:v.追捕,追求,繼續(xù)從事
trace:n. 蹤跡，痕跡;vt. 跟蹤，追蹤;追溯,探索;臨摹
switch:n. 開關(guān)，突然轉(zhuǎn)變;v. 改變，交換
follow:vt. 跟隨，追趕，沿著…前進，仿效;vi. 跟隨，緊接
第四題：
devote:vt. 將…奉獻(給)，致力于
composition: n. 作文,著作,組織
compound:n. 混合物,復合字;a. 復合的,混合的,合成
percent: n. 百分比,百分數(shù)
proportion:n. 比例，率，份兒，部分，均衡，調(diào)和;vt. 使成比例，使均衡
第五題：
increasingly:ad. 日益地，愈加地
consequence:n. 結(jié)果，后果
boost:n. 推進,支援;v. 推進,提高
burden:n.重負,負荷;重擔v.使負重,裝載;加重壓于,煩擾
discharge:v. & n. 排出，放出，允許…離開，釋放，放電
dominate:vt. 支配的，統(tǒng)治，控制，高出于，居高臨下;vi. 居支配地位，處于最重要的地位
A) trails
B) therapies
C) symptoms
D) symbols
2.With the increasing unemployment rate, workers who are 50 to 60 years old are usually the first to be ________.
A) laid off
B) laid aside
C) laid out
D) laid up
3.The physical differences between men and women can be ________ directly to our basic roles as hunters and child-bearers.
A) pursued
B) traced
C) switched
D) followed
4.It is clear that the dog has a much greater ________ of its brain devoted to smell than is the case with humans.
A) composition
B) compound
C) percent
D) proportion
5.American college students are increasingly ________ with credit card debt and the consequences can be rather serious.
A) boosted
B) burdened
C) discharged
D) dominated
第一題：
trail:n. 蹤跡,小徑,尾;v. 拖,尾隨,追蹤
therapy:n. 治療
symptom:n. 病癥，癥候，征兆，表征
symbol:n. 象征，符號，標志
第二題：
lay off:解雇;停止做
lay aside:把...擱置一旁;儲存
lay out:安排,布置;擺出,展開
lay up:使臥床不起
第三題：
pursue:v.追捕,追求,繼續(xù)從事
trace:n. 蹤跡，痕跡;vt. 跟蹤，追蹤;追溯,探索;臨摹
switch:n. 開關(guān)，突然轉(zhuǎn)變;v. 改變，交換
follow:vt. 跟隨，追趕，沿著…前進，仿效;vi. 跟隨，緊接
第四題：
devote:vt. 將…奉獻(給)，致力于
composition: n. 作文,著作,組織
compound:n. 混合物,復合字;a. 復合的,混合的,合成
percent: n. 百分比,百分數(shù)
proportion:n. 比例，率，份兒，部分，均衡，調(diào)和;vt. 使成比例，使均衡
第五題：
increasingly:ad. 日益地，愈加地
consequence:n. 結(jié)果，后果
boost:n. 推進,支援;v. 推進,提高
burden:n.重負,負荷;重擔v.使負重,裝載;加重壓于,煩擾
discharge:v. & n. 排出，放出，允許…離開，釋放，放電
dominate:vt. 支配的，統(tǒng)治，控制，高出于，居高臨下;vi. 居支配地位，處于最重要的地位