【单选题】【消耗次数:1】
I am not sure whether I can gain any profit from the investment, so I can’t make a(n) ____ tohelp you.
exact
defined
definite
sure
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①  you to offer
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③  your offering
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【单选题】 — I can’t find my mobile phone. I’m sure it’s in this room. — _______. I’ll call you with my phone. When it rings, you can follow the sound.
①  Excuse me.
②  Good luck
③  Don’t worry
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①  do
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①  Why do you ask?
②  No. Im afraid not.
③  Sure, no problem.
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①  No, no. I can take it myself
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