动动脑筋！

1. It is very difficult for pandas to have babies. 大熊猫繁衍后代非常困难。

It’s +形容词+for sb to do sth 对某人来说做某事是怎样的

It’s very good for us               (do) eye exercises.

It’s easy for you            (learn) English.

2. However, the bamboo forests are becoming smaller and smaller .

Smaller and smaller是比较级 more and more 结构 。 表示越来越…

The prices(价格)are getting              and            (high)

多音节词在比较级前加more and more 如: 越来越漂亮                          

The story is becoming     _____                    (interesting).

3.Giant pandas are now in danger.大熊猫正处于危险中。

Be in danger 意为：处于危险中。 其形容词为 dangerous 危险的

It is       __        （danger）for women to walk alone at night.

Fire can be very       ___     (danger) if we don’t be careful with it.

4.If we do nothing , soon there may be none left.

如果我们什么都不做， 很快世界上就一只熊猫也不剩了。

句中的left 是leave 的过去式， 意思是：剩下的， 留下的。