One bad harvest could ______ all of a grower’s profits for the previous several years.
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I prefer drinking________ coke, because I want to lose some weight.
Qualifications are not absolutely ___________, but some previous experience is useful.
If students want to enlarge their vocabulary, it is advisable to make a careful study of the _________ words when they come across a new word.
Harry was ________ by the President as the Security Adviser for the government.