一个英语疑惑With all my attention ______ on this exam,I did a good

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一个英语疑惑
With all my attention ______ on this exam,I did a good job.应该用focused还是focusing呢,为什么
Robert is said ______ abroad for two years ,but I don't know which country he studies in.用to have studied还是to be studying呢,为什么

1.focused
attention注意力被集中在考虑中,主动语态说法：pay attention/focus attention,所以当attention作主语就要用被动,过去分词表示被动的意思
2.to have studied
因为for two years,看到for/since前面用完成时,或者更合适的可以用：to have been studying,完成进行时,就能让你的问题得到圆满的解决

She did very ( )on this exam..A good B bad C fresh D badly. I am nervous about my exam.______ A Relaxed B Not at all C N This time my exam is (good),and I am happy. I did good in all of them expect the English exam 这句话有没有错误? 一个英语句子,But my diary is good on nature：the first time I saw a With all my attention ____ my homework,i didn't even notice From now on,baby!I will draw my all attention on you and you 英语填空题1.I ______(leave) in a minute.I ______(finish) all my w with her attention （ B ） on her book she did Jim,I passed the English exam.Did you?() A.good idea.B.Congr ,I have to put it away and focus my attention on study this Today I had a great time with my good friends (on ) the scho