Usage of 'think of /think about' in sentences

Front

Fill in the blank: I often ________ my childhood when I visit my hometown.

Back

Think about

Front

I can't ________ a good reason for his behavior.

Back

think of

Front

Fill in the blank: When I ________ my future, I feel excited and nervous at the same time.

Back

think about

Front

She always ________ the consequences before making a decision.

Back

thinks about

Front

He needs to ________ a solution to the problem.

Back

think of

Front

Did you ________ what I said earlier?

Back

think about

Front

Fill in the blank: I often ________ my favorite childhood memories when I feel homesick.

Back

think of

Front

She needs to ________ her options before making a decision.

Back

think about