They are____Nanjing now. [ ]

Your watch looks so nice. It must be expensive.—No. I ____ 20 yuan on it.

Do not give up! Perhaps ________ tough task needs more of your effort. — I won’t. I’ll have ________ second try anyway.

_____breakfast , I usually have an egg , some bread and a glass of milk .[ ]

Why are there a lot of dead fish in the river?－Because they were ______ by the polluted water.