Question

几道初中英语语法题

6. I have some _________ in working out the problem.
A. difficulty B. difficulties C. troubles D. difficult

7。There is a wire pole along the road _________ meter.
A. about fifty B. every fiftieth C. each fifty D. every 50

8Southerners _________ rice.
A. lives on B. feeds on C. lives on D. feed on

1 0. They picked leaves from the trees and _________.
A. fed them to some little white worm B. fed some little white worm on them
C. fed some little white worm with them D. A and C

答案是 ABCD。我都错了唉。请大家各个解释下行不，不要答案，求解释!
有机会追加分。记得。
我的答案是 C/C/D/C

第一题我看错啦，trouble 不可数对吧。
第二题不知道怎么选，如果选C 为什么metre 不用加s
第三题 主语不是复数吗，选C 不是第三人称单数才这样吗
第四题 完全不知道怎么选，觉得那些介词都很奇怪 带入的话。

再补充一题吧

There is not enough light and _________ in this picture.
A. dark B. darkness C. blackness D. shade
选D 什么意思啊。

Answer 1

have difficulty in doing sth 为固定搭配
（多注意积累固定搭配）

every +序数词 =每**
据题意为每50米故选b

live on 是 靠*为生
feed on 以*为食物

feed A to B 把A 喂给b 吃
feed A with B把 b喂给 a吃

Answer 2

1.
大学语法全解里这样写道：
have some difficulty/trouble in doing中的difficulty和trouble为不可数名词，所以答案为A