题干
－We could have asked Mr. Zhang for help. He is always ready to help others.
－I ________ that. A long time _______.
－I ________ that. A long time _______.
A：have forgot, waste
B：forgot, wasted
C：forgot, was wasted
D：forgot, has been wasted
答案(点此获取答案解析）
C
， 
从右边数是第
是第
后面是
， 
从左数是第