6.　　　 They began a __________ (一系列)of experiments.

5.　　　 Some of the children’s paintings are on ________ (展出)at school.

4.　　　 Knowledge is _______ (力量)

3.　　　 The summer ________(假期) is from July 5 to August 31.

2.　　　 The academic conference was _________ (主办)by our university.

1.　　　 He took an _______(冒险的)voyage to the North Pole.

25.　 The president of this university t_________ agree to this plan the group made.

tain 17.slaves 18.spreading 19.intelligence 20.traditional 21.express 22.universal 23.guitar 24.desire 25.totally

unit 12

24.　 The children in poor areas d________ that they should have better classrooms to study in.

23.　 Mark likes to play the g_________ instead of the any other musical instruments to enjoy himself when he is free.

22.　 Though English is widely used all over the world, it isn’t ye a u________ language .