According to the Los Angeles study, immigrants ______.
A. sometimes help to maintain the existence of some industries
B. sometimes cause employment to fall
C. may lower the wages of natives in general
D. may help promote inflation
A．unsettlingB．unbelievableC．unworkingD．understanding
A. unsettling
B. unbelievable
C. unworking
D. understanding
The kind of air pollution that is most harmful to health is caused by ______.
A. lead emissions
B. carbon-dioxide emissions
C. sulphur dioxide emissions
D. small particles
What is NOT true according to the passage？
A. It is very likely to obtain something from a non-profit organization.
B. What is not useful for you may be just what others need.
C. You may need to create a freecycle organization if you can't find one nearby.
D. You have to meet with the giver if you want the thing he offers.
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