The missing boys were last seen ____ near the river.(NMET94 25)A.playing B.to be playing C.play D.to play我觉得选b 因为感官动词see变为被动时要加to,然后又强调正在,所以选b

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The missing boys were last seen ____ near the river.(NMET94 25)
A.playing B.to be playing C.play D.to play
我觉得选b 因为感官动词see变为被动时要加to,然后又强调正在,所以选b

C.play
see sb do sth