问题
选择题
I had never heard an English word ________ before I went to junior high school. [ ]
A. speak
B. to speak
C. speaking
D. spoken
答案
答案：D
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I had never heard an English word ________ before I went to junior high school. [ ]
A. speak
B. to speak
C. speaking
D. spoken
答案：D
下列变化事实和相应的解释不一致的是（ ）
| 选项 | 现象或事实 | 解释 |
| A | 金刚石很硬、石墨很软；性质差异较大 | 两者的原子排列方式不同 |
| B | 温度计中的水银（汞）热胀冷缩 | 原子本身的大小发生改变 |
| C | 加油站周围闻到汽油的气味 | 分子不断的运动 |
| D | 50mL水和50mL酒精混合后体积小于100mL | 分子之间有间隔 |
A．A
B．B
C．C
D．D