what is this?—this is a pen.哪里错了

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whatisthis?—thisisapen.哪里错了whatisthis?—thisisapen.哪里错了whatisthis?—thisisapen.哪里错了What''sthis?It''sapen

what is this?—this is a pen.哪里错了
what is this?—this is a pen.哪里错了

what is this?—this is a pen.哪里错了
What's this?
It's a pen.
这样呢?