Jack was a heavy smoker. His mother didn't like him smoking，and 1.   

he couldn't give it up. At about 9 o'clock in one evening, Jack was seen  2.  

smoking in the living-room again. “Don't smoke in the living-room,  3. 

Jack!”said his mother in an unhappy voice. Heared this，Jack went  4.  

back his own room and shut the door. While he was sitting in bed,  5.  

he couldn't help smoke again. About an hour later，Jack's mother   6.  

smell heavy smoke. She got up and opened Jack's bedroom. Good heavens! 7.  

Jack's quilt was burning while he was sleep！ She quickly got some   8.  

water and put up the fire. Jack was given a good lesson. “I'll give up  9.  

smoking from now on, Mum.”Jack said in low but determined voice.  10. 

地基土载荷试验中，土样选择正确的是（）。

A.饱和状态下的土，厚度不超过30cm

B.天然湿度下的原状土，厚度不超过20cm

C.最佳含水量的土，厚度不超过30cm

D.天然湿度下的原状土，厚度不超过30cm