Many early Europeans, ________ the earth to be flat, feared that Columbus would fall off the edge of the earth.
The old man, forlife had been very hard, donated his possessions to poor villages in Anhui.
--Why do you look so upset, Linda? --There are so many troublesome problems____.
I lost the key to my dormitory. Could you ____ for the night?
--Silly me! I forgot the color of my luggage. --What aboutover there?
--The concert won’t start till seven. Why____ so early? --You know I don' t want to be at the traffic there. It’s terrible during the rush hour.