1.Bob solved the problem in a very short time,for he ______f

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1.Bob solved the problem in a very short time,for he ______for a long time.
A.was trained B.had trained C.had been trained
2._______the song sung by him is very popular all over the world,I don't think it makes any sense.
A.While B.Unless C.Since D.As

C 首先看选项,都是过去时,就不用考虑时态了,那么就是语态了,Bob是被训练,这里train是训练的意思.其二前面是一般过去时,而他被训练是发生在解决问题之前,故用过去完成时,表示动作发生在前一个动作之前.A 整个句子的意思是虽然她的这首歌在全世界都受欢迎,但是我认为它并不怎么样.while在这里便是转折对比的意思.

He wa very hungry.He ate up all the food in a short time. He found it very difficult___ the work in such a short time. it`s hard for them ____ to the beach in a short time 1.to ri Danny wonderd.Can he work out the problem in such a short ti we admired the way __ he solved the problem A.how B.which C. He stay in Beijing for a short time.改为同义句 He went to Beijing 英语翻译1.he thought he had already solved the problem ,but that 翻译It is high time that we solved the problem 还有 the firemen managed to( )the fire in a very short time(还有 This is the way ___ he solved the diffcult problem. was,difficult,too,the,problem,to,solved,in,week,a,just,be In a word,if we pay much attention,the problem can be solved