mancannowcreateradioactiveelements,thereisnothinghecandotoreducetheirradioactivity.A.AsB.WhetherC.WhileD.Nowthat13.Tomwasveryhappywhenhisparentstoldhimthatthey＿＿backtoAmericasoon.A.wouldcomeB.willcomeC.i

Question

______ 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

Answer 1

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