______ for a long time, most of the crops in this area died from lacking water.
28. We desired that help ___here without delay.
27. Helen had to shout ___above the sound of the music.
26.If you want to succeed ,you must work hard and ____you should be sure of success.
25. The only language ____is easy to learn is the mother tongue.
24. He is the first person you can think of to rely on, for he is always willing to ___whoever is in trouble.