单词拼写。

1.Great scientific ______ (成就) are the results of years of failure, years of trying to create

something that has never existed before.

2.They built a raft to cross the sea and were ______ (袭击) by ancient sea creatures.

3.How many ______ (德国人) are going to visit their town next month?

4.The students were listening to the teacher ______ (专心).

5.The new monitor apparatus is ______ (自动地) controlled.

6.Since changes is salinity and ______ (温度) affect water's density, the water in the ocean is

always moving.

7.Going on a trip to a far-away ______(目的地) can be expensive and difficult.

8.There is a ______ (广泛流传的) belief among bioengineers that it will one day be possible to

create life under laboratory conditions.

9.The murderer was ______ (判处) to death.

10.The majority of doctors believe smoking is ______ (有害).