问题
选择题
—Is there any possible way to help them get rid of such a bad habit?
—To tell the truth, it’s very hard. But we ________ on this problem, trying to improve the situation .
A．worked
B．had worked
C．are working
D．had been working
答案
答案：C
题目分析：句意：--有可行的方法来改掉坏的习惯？--说句实话，很难。但是我们正在解决这个问题，试图提高现状。从第一句可以看出现在还没有改掉习惯，所以应是现在正在想法去解决，故选C。
点评：本题难度适中。动词的时态是高考的热点，它出现在单选和短文改错中的次数较多，需要考生一定掌握不同的时态的用法。
即学即练：The five-year-old girl ____ by her parents.
A is looked B has looked for C is being looked for D has been looked
解析：C。在带有介词的动词短语用于被动语态句中，介词不能省，否则就变成了不及物动词短语，而不能用于被动语态的句子中。