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Theoldcouplewalkedratherslowly,andcouldbeseen,fromtimet...

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問題詳情:

Theoldcouplewalkedratherslowly,andcouldbeseen,fromtimet...

The old couple walked rather slowly, and could be seen, from time to time, to stop and rest, ______ out to sea.

A. to be staring               B. stared               C. having stared            D. staring

【回答】

D

知識點:非謂語動詞

題型:選擇題

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