_________ throwing those stones，please．（ ）
| A． |
Stop |
B． |
Stops |
C． |
Stopping |
D． |
Stopped |
Lily is a friend of ______．（ ）
A．Mary's mother'sB．Mary's mother's of
C．Mary mother'sD．mother's of Mary
They didn't go home ______they finished their work．（ ）
A．becauseB．whereC．untilD．while
The glass bridge in Shijiazhuang is ______than any other one in China．（ ）
A．longB．the longest
C．longestD．longer
_____ with my father's handwriting， mine is poor．（ ）
A．CompareB．ComparedC．ComparingD．Compares
We can overcome all the difficulties by_____ together．（ ）
A．workB．worksC．workingD．worked