You have made greatprogress in your studies of English，haven’t you一Yes，but much _______ ． ‘

The farmers were sure that fresh water lay ____ in the earth, so they dug ____ to find it

Why does the lake smell terrible? — Because a large amount of water_______

The fact has worried teachers and parents ________ more and more students have got near-sighted.

ame good friends quickly, ______ourlife experiences couldn’t have been more different.