The new system should be tried out first_______it is put into use.A. beforeB. after C. when D. while

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• Would you mind ______ he attends the meeting? [ ]A. that B. ifC. how -八年级英语
• Be quick, we have to get to the station before 11:45 _____ we can catch the 12:00 train. [ ]A. since
• I didn't go to the barbecue last night ______ I had something more important to do. [ ]A. so B.
• ______ you work harder, you will fail the exam. [ ]A. Until B. If C. Unless D. Because-九年级英语
• I have made many friends _____ I came here. [ ]A. forB. afterC. since D. before -八年级英语
• _____ the car's old, it still runs well. [ ]A. BecauseB. So C. Although D. But -九年级英语
• ______ hamburgers are junk food, many children like them.[ ]A. If B. UnlessC. Because D. Although -九
• —Do you know _____ we'll get there at 3:00 this afternoon? —I'm afraid we'll be late.
• I spend much money on books _____ I am not rich. [ ]A. but B. so C. even though D. as if -九年级英语
• She had a stomachacheshe ate something bad. [ ]A. so B. because C. or D. although -九年级英语
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• The world's population problem will be serious all the countries do something to control it. [
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