1.   He also gave some serious thought to how he should look.

2.   He said he received a couple of calls from job-placement agencies yesterday, but has not given a new job serious thought.

3.   It was high time she got down to serious thought about her doctorate.

4.   Not a serious thought in my head.

5.   She was a dreamy young woman who never gave much serious thought to her future.

6.   But little serious thought has been given to this problem.

7.   Needing to think very deeply about her situation, however, Leith pushed thoughts of Sebastian from her and got down to serious thought.

8.   You could be spending a lot of time in serious thought, much to the consternation of those around you.