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I can’t say which sofa looks better. It’s just a (an) _____ of personal preference.

The room is in a terrible mess; it ________have been cleaned.

–-I feel down now. All my work goes for nothing.

---___________. That’s life.

I don’t like to travel to big cities, because to me, one city is much like        .

--- May I speak to your manager Mr. Williams at five o’clock tonight?

--- I’m sorry. Mr. Williams        to a conference long before then.

We’ve turned out large quantities of cars. This year      we’ve produced thirty thousand ones.

 A fire broke out in a commercial mall unexpectedly ,     the customers and the persons working there fleeing for safety.

I think this trip was well worth _____we had paid.

—Now where was I ?

---You _____me about your travels in Canada.

---Could we finish the project according to the schedule?

---I doubt that. The problem remains ______ we can get financial aid within this week.