问题描述：
—So you know Della?—Yes,it was last week I surfed the Internet.A．that B．when C．why D．whom
—So you know Della?
—Yes,it was last week _____ I surfed the Internet.
\x05A．that \x05\x05\x05\x05B．when\x05\x05\x05\x05C．why\x05\x05\x05\x05D．whom
—So you know Della?
—Yes,it was last week _____ I surfed the Internet.
\x05A．that \x05\x05\x05\x05B．when\x05\x05\x05\x05C．why\x05\x05\x05\x05D．whom
问题解答：
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