1 . When they were first introduced, many farmers ____________ a great way ____________ crop disease and increase production.
当它们第一次被引进时, 很多农民喜欢把它们作为防治农作物病虫害和提高产量的重要手段。

3 . Once he has made up his mind ________(fight) against the difficulties, nobody is able to stop him. （所给词的适当形式填空）

4 . John called on western countries to _______to save the people of Ethiopia from starvation.

A．fight

B．stick

C．connect

D．unite

5 . When they were first introduced, many farmers welcomed them as a great way to ___________and increase production.  
当它们被首次推广时, 许多农民欢迎它们, 把它们作为抗击农作物疾病和增加产量的好方法。