1.   I suppose I lacked serious ambition.

2.   Many of the students lack ambition.

3.   My teachers always told me that I lacked ambition, and would never get anywhere.

4.   Who had said he lacked ambition?

5.   He effectively disguised his own fear that he was lazy and lacked ambition and that he would dissipate his luck, talent, and good fortune.

6.   He would hang with older men who did not care if he lacked ambition.

7.   Lebed has never lacked ambition.

8.   Ms. Phillips does not lack ambition.

9.   No one can accuse the symphony of lacking ambition.

10.   Walters is not lacking ambition.