I will leave you alone so you can _______ the problem and make a decision on your own. A: mull over B: think on C: think of D: mull about

They'll need time to the proposals. A: boil over B: mull over C: pull over D: hand over.

Nowadays, it is not uncommon for parents to flirt with the idea of home-schooling when they experience problems with some public schools. A: madly mull over B: casually think about C: emotionally flip over D: energetically beat about