The childhood of Tom Sawyer and Huck Finn in the Mississippi is a record of a vanished way of life in the( )Mississippi valley
正确答案： C
本题解析：
马克吐温是以为地方主义作家，他的作品主题是密西西比河流域和美国的西部。而汤姆索亚和亨克贝利的故事发生在美国内战前的密西西比河流域。
Opposition leaders will be watching carefully to see how the Prime Minister ________ the crisis.
Now many major employers are beginning to demand _______ the completion of school
In the original test，all the animals in a test group are given a substance _______ half of them die
Nobody but you _______ what he said.
Some persons gain goal and direction from their tensions;others ________ under pressure.
That is the house _______ you can enjoy the scenery.
The teacher told us the fact _______.