分类：教育/科学-学习帮助
问题：高高手帮忙解释几道单选题1.
1. ---Why did you arrive so late?---We were ____  in the rush hour for half an hour.A. put up      B. held up      . broken up    D. given up2. Her hair became gray ____ the passing of the years.A. in       B. for        C. at             D. with6. The swimmers we1. ---Why did you arrive so late?---We were ____  in the rush hour for half an hour.A. put up      B. held up      . broken up    D. given up2. Her hair became gray ____ the passing of the years.A. in       B. for        C. at             D. with6. The swimmers were standing along the bank, ____ swimming suits.A. all of whom wearing  B. all wearing    C. all wore    D. all of them wore8. This dance is known ____ country music.A. performed by   B. performing with  C. to be performed to   D. took, can’t have spent9. We believe ___ you have devoted yourself ____ sure to come true.A. that, is       B. all that, to be  C. that all, are       D. what, to is11. ---I knocked at your door, but nobody answered.---You should ____ the door bell.A. try touching    B. tried to touch  C. having tried touching    D. have tried to touch12. ---Did you see Tom? He said he would come back for supper at six o’clock.---He seems ___ with Bob in the lake.A. to swim      B. to be swimming    C. to have swim      D. swimming答案为BDBCDCB,请高手解释一下!谢了!
回答：1. hold up 阻挡/使停顿   break up 分解  打碎     give up 放弃   put up 举起2. wh 在这里的意思是随着....   with the time going on, I found ....=as time went on,....6. 答案A all of whom wearing，要用定语从句，把wearing 改成wore.     CD都是完整的句子，因为逗号不能连接两个句子，B做成了非谓语形式， 主语能发出这个动作。8.我认为这道题是不是有问题。我不好解释9.D. devote oneself to / be sure to do sth      what =all that      我相信你投身的（事业/东西）一定会实现。这里是what 结构。     what you want is time = All that you want is time. 11.C. should have done sth 表示过去本应该做的而没做；try doing 试着做某事    你本应该试着按一下门铃  12.seem to do sth     排除了D,C的形式不对，to have swum. 这里表示动作正在进行，用不定式的进行时