麻烦帮解答下这几道单选题麻烦各位了,等选出最佳答案的时候我会追加20分,一共4题1、ThetwomenwalkedinsilenceuntiltheyreacheddoorofNo.12.A、不填；theB、不填；aC、the；theD、a；a2、Allthe

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麻烦帮解答下这几道单选题
麻烦各位了,等选出最佳答案的时候我会追加20分,一共4题
1、The two men walked in ___ silence until they reached __ door of No.12.
A、不填；the B、不填；a C、the；the D、a；a
2、All the Chinese people have become strongly __ since the Sichuan earthquake.
A、uniting B、united C、being united D、unite
3、Martin Luther King set an example __ the rest of the world __ fighting for political rights for black people in the USA.
A、for;with B、to;in C、to;by D、in;in
4、Our government has done alot to solve the shortage of oil,but it may take some time __ we have enough.
A、after B、since C、unless D、before

Answer 1

A B C D
解释下：
1 in silence 固定搭配 后者是特指加THE
2 become是系动词+形容词
3 set an example to sb.固定搭配 by 表示通过
4 在我们有足够多石油之前还有很长时间.before 在……之前