Theoldcouplewalkedratherslowly,andcouldbeseen,fromtime...
來源:國語幫 5.29K
問題詳情:
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