He was last seen _________in his office at about 7:15 p.m..
—By local farmers, we hope them improve their lives.—I think it’s a good idea.
—Have you written anything on Chinese traditional medicine so far?— _________, but I have a plan for it.
—What is the of the sign on the bottle?—It “Keep away from the children”.
—Look! The line of people is ______.—Bad luck. I don’t think we can get any tickets.
—Where is your uncle?—He _____ to South Africa on business. He has ______ there twice.