WHY IS THE RUBBISH STILL HERE?IT OUGHT TO __YESTERDAY.A:BE THROWN AWAY B:HAVE THROWN AWAYC:HAVE BEEN THROWN AWAY D:THROW AWAY

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WHY IS THE RUBBISH STILL HERE?IT OUGHT TO __YESTERDAY.A:BE THROWN AWAY B:HAVE THROWN AWAYC:HAVE BEEN THROWN AWAY D:THROW AWAY

WHY IS THE RUBBISH STILL HERE?IT OUGHT TO __YESTERDAY.A:BE THROWN AWAY B:HAVE THROWN AWAYC:HAVE BEEN THROWN AWAY D:THROW AWAY
WHY IS THE RUBBISH STILL HERE?IT OUGHT TO __YESTERDAY.A:BE THROWN AWAY B:HAVE THROWN AWAY
C:HAVE BEEN THROWN AWAY D:THROW AWAY

WHY IS THE RUBBISH STILL HERE?IT OUGHT TO __YESTERDAY.A:BE THROWN AWAY B:HAVE THROWN AWAYC:HAVE BEEN THROWN AWAY D:THROW AWAY
C
ought to意思是应该怎样却没怎样
是和过去事实相反
所以 主动语态为
ought to have done
因为垃圾是被倒掉
所以是have been thrown away