1. We should not ______ environmental protections to foster economic growth.
A. reduce B. sacrifice C. give D. realize
2. You'd better write down the phone number of that restaurant for future ______.
A. purpose B. reference C. progress D. memory
3. According to one survey, Hawaii ______ the top vacation destination among North Americans for the fourth consecutive year.
A. receives B. elects C. appears D. remains
4. Once a picture is proved to be a forgery, it becomes quite ______.
A. invaluable B. priceless C. unworthy D. worthless
5. Before starting to write effect analysis essay, one should ____ between cause and effect.
A. disguise B. distinguish C. diminish D. derive
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