It took metwo hoursto get there. （对划线部分提问）
you to get there?
—English is too difficult. I don't think I can learn it well.
—Nothing is _____ if you put your heart into it.
本题考查形容词辨析。句意：——英语太难了，我认为我学不好它。——只要你用心，没有什么是不可能的。故选 A。
Scientists have already started to discover the seas. (改为一般疑问句）
scientists started to discover the seas?