5.　　 If you can’t solve the problem in this way, why don’t you try to work it out with another m ________?

4.　　 He w________ out the books he didn't want so that he could put some new ones on the shelf.

3.　　 Can planting ________(烟) make you rich?

2.　　 Our country ________(进口) coffee from Brazil.

1.　　 Ants, mosquitoes, flies are all i ________.

20.　 The ________(牛) are in the shed, and three head of them are John’s.

Unit 19

19.　 This school is m________ for boys, so there are only a few girls in it.

18.　 -- What will you do after you retire, Mr Johnson?

-- I think I will build a ________(小屋) in the beautiful village and spend the rest of my life there.

17.　 Look, on the grassland, there is a female sheep and five l______(羊羔).

16.　 The weather is m____ today；it is neither hot nor cold.