This everything will be the twenty-ninth time we _ the experiment.A.will do B.have done C.did

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• This everything will be the twenty-ninth time we _ the experiment.A.will do B.have done C.did
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• 帮我看看这英文语法before,i'm nothing,since you come to me,to make me to realize ,true love is more than suffering & tough.i thank you,you've had a hard time.thank you for everything you have done for us.Although we are far away but feeling so near.dont worry and please take good care.it's our turn now to do something.
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