* * 内未见尾丝的可能性为
A．环脱落
B．环异位
C．尾丝断裂
D．尾丝进入宫腔
E．以上可能均存在
参考答案：E
The lesson is easy because there are ______ new words in it.[ ]
A. few
B. little
C. a few
D. a little
