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a, a /, the the , the the, a
show am showing will show have shown
What’s wrong Can I help you Do you know What should I do?
you want to send it to people; that you try to get them to do sent to people; what do they want to do you want to send; which you want people to know you want to send to people; what you are trying to get them to do
did you know have you known do you know you know
You，he，I.；us I.，you，he；us you，I.，he ；you He，you，I.；us
in front of next to across from behind
did you know do you know had you known will you know
Do you know it is where that where is it that do you know Do you know where it is that where do you know it is that
Therefore Or rather Namely That is
Did you answer Were you answering Do you answer Had you answered
what to do how to do what to do it how you do
what do the tourists do where the tourists are from what the tourists do where are the tourists from
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