He is ___ help now; he is dying

下列各句中，没有语病的一项是（ ）

The box is too heavy to carry. What’s in it —Oh, I _________ it ________books.

Attention please. Your project ________ be finished by the end of this week.— But we are up to our necks in work. ________ we finish it the next week

ssible means ____ to prevent the air pollution,but the sky is still not clear.