after that ,madame curie did one experiment after another这样说固然对,但用the other可以吗?关键是为什么不行

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• after that ,madame curie did one experiment after another这样说固然对,但用the other可以吗?关键是为什么不行
• 1.Only after a year ( ) to see the result of my experiment.A.I began B.I had begun C.have...1.Only after a year ( ) to see the result of my experiment.A.I began B.I had begun C.have I begun D.did I begin2.( ) in the fields for two hours,they took a rest.A.Having worked B.Working C.Worked D.Being worked为什么第一题c为什么不对
• only after six months,i began to see the result of my work