摘要：48．A．arriving B．traveling C．teaching D．passing
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at the party, we saw Ruth standing alone in the corner of the hall.
A．Arriving B．To arrive C．Arrive D．Arrived
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, the sun was rising in the east.
| A．Arriving there | B．We arriving there | C．Having arrived there | D．We arrived |
When you are at home，give a call to let me know you safely．
A. are arriving B. have arrived
C. had arrived D. will arrive
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