proversity:86. the days are short, ___ it is now December.

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a. because
b. for
c. goes
d. want

请说说because for 表因为时的区别

答案是：B
because表示必然的因果关系；for是对前面所说的事实进行补充说明。

B
从句子结构来看这里应该填一个连词，故排除CD。because,for都是“因为”的意思，但because不能跟在逗号后面，所以选for。

86. the days are short, ___ it is now December. gone are the days when we were young and gay the days __ gone.填is还是are? 『英语猜谜』『What are the strongest days of the week? 』 Are you busy all the time? Have you missed me during these days? There are ( )letters in the word "beautiful". there are four seasons and ( )days in a year Behold, it is threatening to shower. We are in the same boat, let's provide against the rainy days. in the days since count the days是什么意思？ hey,jimmy.why are you always working so late at night these days. ____ready for the coming exams