最大的麦穗

    希腊有一位大学者，名叫苏格拉底。一天，他带领几个弟子来到一块麦地边。那正是成熟的季节，地里满是沉甸甸的麦穗。苏格拉底对弟子们说：“你们去麦地里摘一个最大的麦穗，只许进不许退，我在麦地的尽头等你们。”

    弟子们听懂了老师的要求后，就走进了麦地。

    地里到处都是大麦穗，哪一个才是最大的呢？弟子们埋头向前走。看看这一株，摇摇头；看看那一株，又摇了摇头。他们总认为最大的麦穗还在前面呢。虽然，弟子们也试着摘了几穗，但并不满意，便随手扔掉了。他们总以为机会还很多，完全没有必要过早地定夺。

    弟子们一边低着头往前走，一边用心地挑挑拣拣，经过了很长一段时间。

    突然，大家听到了苏格拉底苍老的、如同洪钟一般的声音：“你们已经到头了！”这时，两手空空的弟子们才如梦初醒。他们回头望了望麦垄，无数株小麦摇晃着脑袋，似乎在嘲笑他们。

    苏格拉底对弟子们说：“这块麦地里肯定有一穗是最大的，但你们未必能碰到它；即使碰见了，也未必能做出准确的判断。因此最大的一穗就是你们刚刚摘下的。”

    苏格拉底的弟子们听了老师的话，悟出了这样一个道理：______________________________。

如图，已知∠1=∠2，∠B=∠C，可推得AB∥CD．理由如下：

∵∠1=∠2（已知），

且∠1=∠CGD（____），

∴∠2=∠CGD（等量代换）．

∴CE∥BF（____）．

∴∠____ =∠C（____）．

又∵∠B=∠C（已知），

∴∠____ =∠B（等量代换）．

∴AB∥CD（____）．

先通读下面短文，掌握其大意，然后从各小题所给的A、B、C、D四个选项中选出最佳答案。

    We all think eating fruits means just buying fruits, cutting them and putting them into our 1. It's not as easy as you think. It's important to know 2 and when to eat.

    Fruit should be eaten on an empty stomach. If you eat fruit like that, it will go straight 3 the stomach into the Intestines（肠道）. It will be good to your health and provide you with plenty of 4 for life activities. Fruit is the most important 5.

    But when you eat two pieces of bread and then some fruit, it is 6 from doing so. Do you know the reason?

    You have probably heard people saying –every time I eat watermelon I burp（打嗝）, when I eat a banana I feel like 7 to the toilet. When the fruit 8 with other food, it produces gas（气体）. That's why you will feel uncomfortable. Actually, we will not 9 if you eat the fruit on an empty stomach.

    Eating a whole fruit is better than drinking the juice. When you 10 want to drink fruit juice, drink only 11 fruit juice, NOT from the bottles or cans. Don't drink juice that has been 12 up. Don't eat cooked fruits because you don't get the nutrients（营养成分）at all. You only get the 13.

    If you have mastered the 14 way of eating fruits, you have the 15 of beauty, health, energy, happiness and a long life. Dark circles under the eyes will not appear.