动词适当形式填空一题

试着解答了一下，希望对你有用：

we are student's of NO. 1 Middle school, last Sunday we ____ (vist) a factory.
visited 根据过去的时间状语last Sunday，判断是过去的时态

the factory is close to a lake which _____(give ) us drinking waker.
gives “供给我们饮用水”的河，是一种常态，用现在时

but we found that the factory was pouring waste directly into the lake, some farmers living near the lake report that some of their sheep and cows ____ (die ) since they drank the water from the lake .
died 强调“喝了湖中脏水”对“现在牛羊”的现实影响，适宜用“完成时”

so we wrote you thid letter ____( see)if you can do something about this.
to see 这里动词不定式表示“目的”
BTW "thid"改称"third"

We think the pollution must _____ (stop ) right now. THank you
be stopped “污染”应“被阻止”，故括号中应该用被动语态

你这个没抄错么，怪怪的。一般来说，如果是中学短文填空的话，时态在全文会比较统一。

the factory is close to a lake which ... 这句IS 变was比较好吧。

their sheep and cows ____ (die ) since they drank the wat