E-books （ ）very popular since they came into being A become B have become C had become D became

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• E-books （ ）very popular since they came into being A become B have become C had become D became
• E-books （ ）very popular since they came into being A become B have become C had become D became
• 1、（）have you lived here?—Since 1998.A、How long B、How far C、How often D、How soon 2、When （） the Singing Club —In 2004.A、did you join B、have you become member C、did you take part in D、have you joined3、What （）you （） since you （）to China.A、have ,done,came B、did,do,have,come C、did,do,came D、have,done,come4、How long have you been here —I have been here（）2000.A、for B、from C、since D、after5、When （）you （）my brother —Last year .A、have,seen B、did,see C、will,see D、
• would 还有两个虚拟语气的题() I were a young and beautiful girl again!A if B Would that C Only if D ProvidedYou should have put the milk in the ice-box; I expect it() undrinkable by now.A became B has become C had become D becomesI ()stay as go with him.A would rather B had better C would just as soon D should have
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• 试题：You should have put the milk in the ice-box; I expect it ____undrinkable by now.试题：You should have put the milk in the ice-box; I expect it ____undrinkable by now.A.became B.has become C.had become D.becomes为什么这里不能用 became 也是过去式啊(变了) 为什么非要用现在完成时
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