Howard Hughes’ parents died _____.
Howard Hughes’ parents died \_\_\_\__.
由于
I was trying to get into the _____ bus when I heard a voice from behind.
I was trying to get into the \_\_\_\__ bus when I heard a voice from behind.
In the road accident the other day three people _____，including the driver.
In the road accident the other day three people \_\_\_\__，including the driver.
The young man _____ visited our school this morning is Maria’s brother.
The young man \_\_\_\__ visited our school this morning is Maria’s brother.
With the guide _____ the way, we set off on foot into the dark night.
With the guide \_\_\_\__ the way, we set off on foot into the dark night.
I tore open the box only _____ that some papers were missing.
I tore open the box only \_\_\_\__ that some papers were missing.
一定质量的理想气体，由初始状态A开始，状态变化按图3中的箭头所示方向进行，最后又回到初始状态A．对于这个循环过程，以下说法不正确的是（ ）．
一定质量的理想气体，由初始状态A开始，状态变化按图3中的箭头所示方向进行，最后又回到初始状态A．对于这个循环过程，以下说法不正确的是（ ）．
_____ of the two brothers are fond of classical music.
\_\_\_\__ of the two brothers are fond of classical music.
如图4所示，三角形物体M静止在光滑的水平地面上，M的斜面也光滑．方形滑块N放在M的斜面顶端，由静止释放．在滑块N沿斜面下滑的过程中，下列说法正确的是（ ）．图4
如图4所示，三角形物体M静止在光滑的水平地面上，M的斜面也光滑．方形滑块N放在M的斜面顶端，由静止释放．在滑块N沿斜面下滑的过程中，下列说法正确的是（ ）．图4
D的化学式是____，D溶液显碱性的原因是（用离子方程式表示）____．
D的化学式是\_\_\_\_，D溶液显碱性的原因是（用离子方程式表示）\_\_\_\_．