og84

4. The only way for growers to salvage frozen citrus is to process them quickly into juice concentrate before they rot when warmer weather returns.

(A)   to process them quickly into juice concentrate before they rot when warmer weather returns

(B)   if they are quickly processed into juice concen­trate before warmer weather returns to rot them

(C)   for them to be processed quickly into juice concentrate before the fruit rots when warmer weather returns

(D)   if the fruit is quickly processed into juice concen­trate before they rot when warmer weather returns

(E)    to have it quickly processed into juice concentrate before warmer weather returns and rots the fruit

这题答案是E, 就是be to do结构, 但是这里不定式表目的, be to do结构, 虽然OG里面确实在用它表示将来的时候都不正确, 但是ETS没有说是错误的, 就不能自己主观认为.

今天找到了一题，就是说不定式可以表将来

255. The bank holds $3 billion in loans that are seriously delinquent or in such trouble that they do not expect payments when due.

(A) they do not expect payments when

(B) it does not expect payments when it is

(C) it does not expect payments to be made when they are

(D) payments are not to be expected to be paid when（C）

(E) payments are not expected to be paid when they will be

其中OG对E得选项可以看出

Also, are not to be in D and will be in E inappropriately shift action to the future.

待定

be to do不一定是错的. 有题:

To read of Abigail Adams’ lengthy separation from her family, her difficult travels, and her constant battles with illness is to feel intensely how harsh life was even for the so-called aristocracy ([7Aris5tCkrEsi]n.贵族, 贵族政府, 贵族统治) of Revolutionary times.  A是对的.