1. 大熊猫有原来的两倍多。
There are ___ ___ _______ ______ giant pandas __ _____ __ _____.
2. 防止饮用水污染是非常必要的。
It is ___important______ to keep the drinking water ______ being polluted.
3. ______ of the two men showed us around the village.
A. The stronger
B. stronger
C. The strong
D. The strongest
稍解释下2、3
