______ man can now create radioactive elements ,there is not

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______ man can now create radioactive elements ,there is nothing he can do to reduce their radioactivity.
A.As B.Whether C.While D.Now that
13.Tom was very happy when his parents told him that they＿＿back to America soon.
A.would come B.will come C.is coming D.are coming
14.Understanding the cultural habits of another nation,especially ______ containing as many different subcultures as the United States,is a complex task.
A.one B.the one C.that D.such
15.By the time we got to the railway station,the train
A has already left B will have left already
C was leaving already D had already left

12.___C__ man can now create radioactive elements ,there is nothing he can do to reduce their radioactivity.
A.As B.Whether C.While D.Now that
13.Tom was very happy when his parents told him that they＿B＿back to America soon.
A.would come B.will come C.is coming D.are coming
14.Understanding the cultural habits of another nation,especially ____B__ containing as many different subcultures as the United States,is a complex task.
A.one B.the one C.that D.such
15.By the time we got to the railway station,the train __D__
A has already left B will have left already
C was leaving already D had already left

英语翻译：he is not only hot,he is radioactive. tom is not there right now近义词 Is there any people or teams who can create a spaceship that There is no difficulty ______ we can not overcome.A.which B. There is not enough oil in the world now. Man is not made for defeat,A man can not be destoryed bui no Man is not made for defeat.A man can be destroyed but not de Lily is not here now,Can I take a m. Lily can not _____(is) at school now. There is nobody ____ you can turn for help now do road the now not cross there's red man the 连词成句 The man over there is reading a newspaper now对over there提问