—I’m sorry, but the boss isn’t here yet. Shall I have him call you when he comes back?
—No, I’ll call him back. If I call again in half an hour, do you think she ________ ?
A．had arrived
B．has arrived
C．will arrive
D．will have arrived
答案：D
一般将来时表示将要发生的动作，而将来完成时表示将来某个时间之前已经发生或完成的动作。根据语境可知是强调将来的结果，应用将来完成时。
一年的化学学习，我们亲身体验了一系列的探究实验，感受到了化学的无穷魅力．小强在回顾整理下列实验中提炼了许多探究方法．
实验一、探究分子在不断运动（如图）
实验现象：______．
该实验的探究方法是：对看不见、摸不着的粒子，要“观察”它的运动可以设计实验，通过宏观的现象来间接认识．
实验二、探究二氧化碳与水的反应（取四朵用紫色石蕊溶液染成紫色的干燥的小花，进行下图所示实验）
实验现象：（I）、（IV）中的小花变红．
设计（Ⅱ）、（Ⅲ）实验的目的是：______．
该实验的探究方法是：设计分析______（填“A”或“B”或“C”，获得结论．
A．仅一个单因素的实验 B．有多种因素的对比实验
C．用前面实验的生成物继续实验
实验三、验证二氧化碳与氢氧化钠溶液确实发生了反应（实验如下表所示）
| 方案 | 实验步骤 | 实验现象 |
| 1 | 取两个等体积的软塑料瓶，充满二氧化碳，然后 ____________________________________________________． | |
| 2 | 先将二氧化碳通入盛有足量氢氧化钠溶液的试管中，然后 ____________________________________________________． |
我认为方案1的探究方法是______，
方案2的探究方法是______．
小结：上述三个实验告诉我们：当某些化学反应现象不明显或不足以说明问题时，要千方百计通过设计出具有明显现象的实验，来准确推知和认识化学反应．
“Where is the bus? Why is it always late?” I asked myself. I was going to be late ___36___ the manager wasn’t going to be pleased. “Thank God, here it is!” The bus came round the corner and I got on. Ten minutes later I was walking into the ___37___ where I work. “Twenty-five past nine. I ___38___ the manager doesn’t notice.” But I was not ___39___. “Smith!” shouted the manager. “Late again. What’s your ___40___ this time?” “I am afraid the bus was late, Mr. Brown.” “___41___ up earlier tomorrow! Anyway, go to your place at the counter. We’ll be opening in a few minutes.” My first customer was a pretty girl wearing a red dress. ___42___ her was a young man of about 25. He seemed very ___43___, and every few seconds he looked towards the main entrance. The girl drew some money and ___44___ about opening an account(帐户). I gave her necessary ___45___ and she went out. ___46___, I noticed a tall man by the door, carrying something ___47___ with brown paper. Turning to my next customer, I was frightened to see a gun sticking out of his coat. The next moment a loud noise ___48___ my ears. Everything went black. I was falling… It seemed to be a long time ___49___ I opened my eyes and I found myself in bed! ___50___ shaking from the memory of this terrible dream, I got dressed and ran out of the house. ___51___, the bus wasn’t on time, and I got to the bank at 9:25. “Smith!” the manager cried out in a voice like thunder. “___52___ of your excuses! Start work at once!” To my ___53___, the first customer was a girl ___54___ a red dress and behind her stood a man carrying something wrapped in brown paper. The ___55___! Sometimes life is full of coincidences (巧合)!
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