It’s hard to believe____ the way out of the forest without the help of the local guide.
Did you find the small village yesterday? — Yes, without any difficulty, for it has ______ changed over years.
I am really sorry that I can’t visit you because I have to help my sister _______.[ ]
We talked until Mr wu asked us
Which is more important, English or math?—I think English is as _______ as math.