Much rubbish ____ (throw) into the river every year ,so it ____ (pollute) seriously.

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Much rubbish ____ (throw) into the river every year ,so it ____ (pollute) seriously.
Much rubbish ____ (throw) into the river every year ,so it ____ (pollute) seriously.

Much rubbish ____ (throw) into the river every year ,so it ____ (pollute) seriously.
is throwed;is polluted
许多垃圾被扔进河里,河水被严重污染了.被动语态

is thrown. pollutes.
垃圾不可数所以用单数,并垃圾是被扔所以用被动

is thrown, is polluted
被动态。