Mr. Brown suggested _____ the health of everyone present.[ ]

They form a polar molecule, ____ is, ____with a slightly positive end and a slightly negative end.

________ is the boy—He is about 1.80 meters tall.

When I was at a loss, the thought of traveling abroad did _____ to me.

I am tired _____ the partner I have been working with; he is too hard a person______