A．food competition results in the aggressive behavior of fish

　　B．fish become more aggressive as more fish are put into a tank

　　C．crowding is the main cause of the aggressive behavior of fish

　　D．fish become less aggressive when placed in a 100­gallon tank

　　答案　D　

　　4．The best title for this passage might be ________．

　　A．Animals' Right to Live at Ease

　　B．Picture of Relaxation Only If You're Not Inside

　　C．How to Keep Tropical Fish as Pets

　　D．How to Deal with Fish's Aggressive Behavior

　　答案　B　

　　A、B、C、D）中，选出最佳选项。

　　(2016·济南高三模拟) At exactly eleven Sir Percival knocked and entered, with anxiety and worry in every line of his face. This meeting would decide his future life, and he obviously knew it.

　　“You may wonder, Sir Percival，” said Laura calmly, “if I am going to ask to be released

　　(免除)

　　from my promise to marry you. I am not going to ask this. I respect my father's wishes too much.”

　　His face relaxed a little, but one of his feet kept beating the carpet.

　　“No, if we are going to withdraw (退出) from our planned marriage, it will be because of your wish, not mine.”

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