英语语法问题1.Arrive at the classroom well before the test ______

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英语语法问题
1.Arrive at the classroom well before the test ______ so you don’t feel rushed.
A.beginning B.has begun
C.will begin D.begins
2.A series of attempts ______ made,he came to a successful solution to the problem.
A.to be B.had been
C.were D.having been
3.The police ____ Mr.Burger for the wanted suspect and informed the headquarters immediately.
A.treatedB.took
C.believedD.recognized
选哪个为什么说明原因?

/>D 这是祈使句,时间状语从句用一般现在时.

D 独立主格结构,做状语.用“having done"表示时间上比主句事情先发生.

B took sb.for 搭配,表示“把.（误）视为.".

再问：第二题还是不懂，独立主格是怎样的？如果遇到类似的题目怎么做？
再答：独立主格句特点是有两个分句，一个分句（如你这道题目里的前一个）里含有非限定性动词，也就是非谓语动词（不定式，现在分词，过去分词形式），这个分句的主语与另一个分句主语不一致。后一个分句就是正常的简单句。另外也有无动词的独立主格结构，如Book in hand, the retured returned from his teacher's office.

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