never forget my experience in Africa, _______ has a great effect on my life.

John is the tallest boy in the class, _____ according to himself.

Don’t blame such a small boy any more. Eventhe wisest___ make a mistake sometimes.

This is Tom speaking.— Oh, it’s greatBut I ______ your voice just now

What we need to settle in this area now is how to ________ all the hyacinth (水、葫蘆), which can make the water dirty.