1. Will you marry me?
2. I don't want to discuss about this on the phone.
3. Politicians will be debating about the bill later this week.
5. Don't mention it to her.
6. I'll contact with you tomorrow afternoon.
7. His writings have influenced the lives of millions.
a lack of food/money/skillsThe trip was cancelled through lack of (=because there was not enough) interest.There was no lack of volunteers.She showed a distinct lack of enthusiasm for the idea of becoming a mother.
Some houses still lack basic amenities such as bathrooms.He lacks confidence.She has the determination that her brother lacks.