Themissingboyswerelastseen________neartheriver.
A、playingA
所填的词为主语补足语，因其后有明确的地点，补足语表示动作当时正在进行中，所以只能使用 playing 。
______ the new plan can be carried out will be discussed at the meeting tomorrow.
_______hegoes,shewillgo,andshenevercares_______happens.
______isrecognizedasthenationalflag-carrier.
Thegirlwasluckyenoughto_______thebadmenandranaway.
You’llbetheretomorrow--youwon’t________me________,willyou?
