1.Scientists started to develop new techniques to increase production from early 1990s. (用强调句型强调划线部分)

______________________________________________.

10.Autumn _________(耕田)should be deeper than the spring one.

9.Jia Sixie's book is a practical g_________ to farming.

8.If you go a_________ nature,you will have to do more work and the results will not be so good.

7.We should develop agriculture without d_________ nature and environment.

6.Today many vegetables are grown not in gardens but in g_________.

5.The biggest problem is the _________(缺少)of arable land.

4.Farmers have long used _________(技巧)such as irrigation to increase production.

3.A foreign visiting d_________ is arriving at the airport at 5 p.m.,would you like to meet them?

2.In China a _________(各种各样)of GM watermelon will be seedless and there is GM rice.