问题
The widespread of super-hybrid rice around the world ______the lives of millions and millions ofpeople suffering from hunger to a great level. [ ]
A: improved
B: is improving
C: has improved
D: has been improving
B: is improving
C: has improved
D: has been improving
正确答案是：
同类题型
．The young often＿＿＿the old in our town．
How are you going to be —I’m going to practice basketball every day.
.– You are not afraid of snakes, are you?— No, certainly notNot rats, not flies, and ____ ants
191 Things went well for him during hisearly life but in middle age his__________seemed to change
Sorry, sir. I made a mistake again.— ________. Practice more and you will do better.