-Why do you look sad?-There are so many problems____.

题目

-Why do you look sad?-There are so many problems____.
A.remaining to settly
B.remained settling
C.remaining to be settled
D.remained to be settled

答案

确定有settly这个单词吗?我在牛津英汉词典上查不到,只有settle 意思为解决.如是此单词,为及物动词.remain 是不及物动词,后不接名词等宾语.其后加ing 变成现在分词,来形容problems,意为问题正保持着；正保持着怎样的问题呢?就由 to be settled 来形容 problems remaining ,意即为正有着待解决的问题.settle 是及物动词,后要接名词等作宾语,problems remaining 其实就是它的宾语,而主语是人（人来解决问题吧?）,现句中主语忽略了.用 settle
来形容 problems remaining 就必须用被动语态（问题被解决）,而用被动语态的要求就是要用 be + 动词的过去分词,即 settle 后加 d 变成 settled .说了这么多,