How many pens do you have? [ ]
A. Three.
B. Blue.
C. Long.
答案：A
The shopkeeper gave us ______ weight: we got 9 kilos instead of 10 kilos. [ ]
A. scarce
B. short
C. light
D. slight
踩水技术的缺点是（）
A．简单
B．方便
C．省力
D．移动速度慢
