-Is your brother at home?-No．He the library．He hasn't come back yet．( )A．was going toB．has been toC．has gone toD．goes to 题目和参考答案——青夏教育精英家教网—

题目内容

1．-Is your brother at home？
-No．He ________ the library．He hasn't come back yet．（　　）

A．

was going to

B．

has been to

C．

has gone to

D．

goes to

分析 --你的哥哥在家吗？
--不．他已经去了图书馆．他还没有回来．

解答答案：C
根据yet，可知应该用现在完成时态．yet是现在完成时的标志词．现在完成时态表示过去发生或已经完成的动作对现在造成的影响或结果．或从过去已经开始，持续到现在的动作或状态．现在完成时态的构成：助动词have/has+过去分词，have been to曾经去过某地； have gone to已经去了某地，结合句意后半句句意：他还没回来，可知前面是已经去了…，故选：C．

点评本题主要考查动词时态，做此类题目要注意时间状语、标志词．根据上下文所表达的含义，做出判断．同时更应记清时态的构成形式．就本题而言，主要考查现在完成时态．

Root，Stem，and Leaf Most plants have root（根），stems（茎），and leaves．Plants use these parts to get light and water．Roots hold the plant in the ground．They take in water and minerals（矿物质） from the ground．		Fruit Fruit is also part of the plant．Fruits keep seeds（种子） in safety so they can grow into new plants．Seeds are made by flowers．They come in all kinds of different shapes and sizes．They can grow into new plants．Sometimes，seeds are kept in safety inside of fruit．Some fruits，like strawberries，have seeds on the outside．In order to grow，seeds need to move to a new place where they can get the water，light，and space they need to live．
Flower The flower is one of the parts of the plant． Flowers come in different colors，shapes，and sizes．Even though they look different，all flowers make seeds．		Connection Flowers make seeds．Then flowers turn into fruits．Seeds inside or on the fruit grow into new plants．

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