1. From 1982 to 1987 sales of new small boats increased between five and ten percent annually.
(A) From 1982 to 1987 sales of new small boats increased between five and ten percent annually.
(B) Five to ten percent is the annual increase in sales of new small boats in the years 1982 to 1987.
(C) Sales of new small boats have increased annually five and ten percent in the years 1982 to 1987.
(D) Annually an increase of five to ten percent has occurred between 1982 and 1987 in the sales of new small boats.（A）
(E) Occurring from 1982 to 1987 was an annual increase of five and ten percent in the sales of new small boats.
两个疑问：
1，increase后面加多少percent，不要by吗？
2，from 1982 to 1987，不需要完成时态，对吗？
我问的问题是不是很傻？
还有这题B，C，D为什么不对，谢谢！
1，Here increase is a vi, only whem increase is a vt, i.e., x increase(vt) y by+ number, but x increase(vi) + number. Thanks for coming up with this point, before I saw your question I hadn't noticed this issue. If you have longman contemporary dictionary, it will help you get this kind of idiomatic usage. If you have broadband connection to internet, you can download electronic version of it from CD. Just go to download zone,you'll find it.
2,from 1982 to 1987, you have to use past tense.
A, the best choice, conveys the relevant information clearly and directly. Because the focus of interest is the sales of new small boats, that should be the subject of the sentence. Since the period of time covered began and ended in the past, the verb should be in the simple past tense (increased). The adverb annually fits most logically after the amount of the increases. B, C, D, and E all distort the focus and disrupt the sensible order of ideas. In addition, B, C, and D use incorrect verb tenses to refer to the simple past (is, have increased, and has occurred). In C, the expression five and ten percent makes no sense without the word between. Finally, E is especially clumsy and confused.
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