简答题I stayed up all night ______ to find a new solution to the problem. A. trying B. have tried C. try D. tried简答题I'll ask Mr. Smith to ring you up ______ he comes back to the office. A. when B. where C. because D. although简答题The course comes in three books of case studies, ______ a variety of business activities in different parts of the world.A.being coveredB.coveringC.coverD.covered简答题The old couple decided to ______ a boy and a girl though they had three of their own.A.adaptB.bringC.receiveD.adopt简答题The bank clerk listened carefully ______ he could discover exactly what the client wanted. A. in case that B. now that C. so that D. provided that多选题No one can afford the villa (别墅) he/she is a millionaire. A、unless B、only if C、if D、except多选题I wonder if it is the first time you this city. A、visited B、was visiting C、would visit D、have visited简答题_____more time, the scientists will be able to work out a good solution to this problem. A、To give B、Giving C、Given D、Be given简答题Reactions to the online management system were more positive ______ those to a paper-based version of the same system. A. which B. as C. than D. that简答题Our _____ grew when the mountain climbers hadn’t returned by nightfall. A、mistake B、eagerness C、threat D、anxiety简答题To ______ the truth, I really didn't know anything about yesterday's meeting.A.doB.tellC.putD.take简答题在一般砖混结构房屋中，关于墙的特点，说法错误的是( )。 A．墙体是主要的承重构件 B．墙体的重量占建筑物总重量的40%～45% C．墙体是主要的围护构件 D．墙的造价占全部建筑造价的30%～40%简答题We are confident that we ______ our export sales by 15 percent by the end of this year.A.increaseB.had increasedC.would increaseD.will have increased简答题As long as you keep on ______ hard, you'll get promoted sooner or later.A.workB.be workingC.workedD.working简答题______ he is still working on the project, I don't mind when he will finish it.A.In caseB.As long asC.Even ifD.As far as简答题If you are writing on official business, keep it _______. A、long and direct B、short and direct C、long and indirect D、short and indirect简答题This river is so big that it is impossible to build a _______ under it without modern technology. A、canal B、tunnel C、channel D、cable多选题He finally lost his and hit his son despite his wife’s objection. A、temper B、manner C、thought D、mood简答题When he was decorating his house, he got the bedroom ____ first. A、to paint B、preparing C、painted D、be painted简答题It was not until yesterday ______ the business negotiation finally came to a successful end.A.whenB.thatC.sinceD.after