Scientists are convinced ___ the positive effect of laughter ____ physical and mental health.

He made up his mind to devote his life _____ pollution ______ happily.

Are you satisfied with what she has done—Not a little. It can’t be ________.

Do you know when Jim’s coming—He _____ 9:00 am

ut forward a lot of plans at the meeting, noneof ______ carried out in their work