一、短语填空
根据句意用方框中所给短语的适当形式填空
prevent...(from...), now that, in time, be harmful to, in one's turn, give birth to, cheer up, break out, watch out for, get the hang of, according to, in all directions, as a result of, block out，get close to
1.________________you've finished your homework, you can go and play football to have a rest.
