Who's ____________ boy in ____________ sweater?  He's David.[ ]

A. a, the

B. the, a 

C. the, the

D. a, a

用所给词的正确形式填空。

1.________ (luck), our team tried our best but could never win the first prize.

2.The policeman told the boys________(not play)football near the road. .

3.Don't make the baby _________( cry ) again.

4.I am taller than him,and I am the ________(slim) of all the students.

5. If you eat too much_________ (health)food, you may be ill.