英语用所给词的适当形式填空,使句子完整、通顺

英语用所给词的适当形式填空,使句子完整、通顺
1.Be__________(care)when you cross the busy street.
2.Which is________(big).the sun or the moon?
3.When a piece of ice is taken into a warm room.it becomes_________
(small)and_______(small).
4.He is________(tall)than any other student in his class.
5.Travelling by air is_______(expensive)than by train.
6.It was getting_______(late),and all the farmers went home.
7.Mr Smith is__________(rich)in our company and he is_________(rich)
than any other person in our company.
8.Of all the boys he sang________(well).
9.Of all the students in our class,Lucy talks__________(little)but
does most.
10.Jack wants to catch up with others.He works__________(hard)than
before.