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nrikikuto
2 năm trước
nguyên tố a nằm ở nhóm iiia. ptk của muối sunfua và muối bromua của nguyên tố này tỉ lệ với nhau theo tỉ số 50:89. xác định a.
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1. He got into bed with a hot-water bottle and ________ his cold out before it could have developed into flu. * A. sweated B. sweat C. has sweated D. sweatened 2.Of one thing I am sure; at no time _______ her father's name. * A. didn't she use B. she has used C. she did use D. did she use 3."Where's your green dress?" - "Unfortunately it _______ in the first wash." * A. shrunk B. shrinked C. has shrunken D. shrank 4.We should take Dingo with us just in case one of the boys _______ nasty. Not that I'd like them to. * A. turns B. will turn C. would turn D. shall turn 5.Taking the Duke by surprise, the girl _______ her arms round his neck trying to kiss him. * A. has thrown B. threw C. thrown D. was throwing 6.Before hanging new wallpaper in my bedroom, I _______ the shelves over my bed, which took me over two hours. * A. have unscrewed B. unscrew C. had unscrewed D. unscrewed 7.It's too late. We won't fix it for the race no matter how fast we _______. You should've come earlier * A. will work B. were working C. work D. would work 8.We _______ the bill and it might have been worse - each of us had to pay about $ 60. * A. have split B. split C. splitted D. had splitted 9.Each time we drove into the sun, my daughter _______ down the window on her side of the car. * A. winded B. wound C. has been winding D. has winded

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