大学英语四级词汇试题
1.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 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