The heart is believed to _____blood into veins(血管) which are netted all over the body, thus keeping a person alive. [ ]

It will really make no difference ________ he doesn’tcome tonight.

Martin looks so well. We’ve never seen him ______ sowell before.

hey had cleaned their bowls in this way, theywould sit __________ at the pot with eager eyes, as if they wanted to eat it

I don’t feel well. I have a cold.—________