It was last night ________ I saw the comet.
20.—I’m looking for a house. I’d like ____ with a big garden. —Yes, madam. We have several of this kind.
19.The prices of goods kept ____. We had to cut the expenses in order to meet our daily needs.
18.Seldom ____ him recently, for you see I’m preparing for the project.
17.I wonder what’s your attitude ____ the problem ____ yesterday.
16.The shopping center in the city was ____ as a result of a cigarette, which shocked the whole country.