小型户外广告牌:_____the hot weather, he couldn't sleep indoors.

1.A
两者豆科引导原因状语从句,而这句就是原因状语从句.但只能用because of．因为for引导原因状语从句是不放句首，且后加句子．但because of可放句首，且后加名词．
the hot weather就是一个名词，所以选A

2.C
问地点，应该用地点状语来回答，在这里只有副词可做状语，而below就是副词．

1.A the hot weather是名词，for是引导状语从句的
2.D 其他三个都是介词

1、B

原因状语从句一般由because, since, as, for引导?注意as,because,since和for的区别:
①如果原因是构成句子的最主要部分,一般用because。because引导的从句一般不放在句子的开头。例如:
I missed the train because I got up late.
注:对于以why开头的问句,一般只能用because引导的从句来回答。
②如果原因已为人们所知,或不如句子的其余部分重要,就用as或since、since比as稍微正式一些。as和since引导的从句一般放在句子的开头。例如:
As he was not well,I decided to go there without him.
Since this method doesn't work, let's try another.
③for表示所说的理由是一种补充说明,因此,for引导的从句可以放在括号里,而且for引导的从句一般不放在句子的开头。例如:
I decided to stop and have lunch, for I was feeling quite hungry.

2、C
Courtyard 院子
down在......下(向下):go down, sit down
under prep. +宾语
below adv 下面, 表示一种状态
bottom 名词