一.按要求改写下列句子

一、
1.what color are
2.whose classroom is
3.How many , can you
4.Don't open
二、
1.把the去掉
2.we-----us
3.can't-----mustn't
4.to 去掉
5.au --=o

三、
supermarket know, policeman, can, left, right, thank, cross, sign, follow

四、
In the park we can do many things. we can climb the hills,do some sightseeing,chat with each other,have a picnic, row the boat, go for a walk,fall in love with each other and fly the kites.
But we can't do any things there. such as, we can't draw or throw the litter arbitrarily , beat sb and smoke, drink.