百度作业网英语单选1.The whole bunch of flowers ___ scattered over the floo
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英语单选
1.The whole bunch of flowers ___ scattered over the floor.
B.are C.has been
为何选B不选C?flower可数?如果说一朵花,难道说a flower吗?
2.In the past few years new machinery ___ in the factory.
A.has been introduced B.had been introduced
为何选A不选B?in the past 是过去时,那么应该用had呀,怎么用现在完成时呢?
1.The whole bunch of flowers ___ scattered over the floor.
B.are C.has been
为何选B不选C?flower可数?如果说一朵花,难道说a flower吗?
2.In the past few years new machinery ___ in the factory.
A.has been introduced B.had been introduced
为何选A不选B?in the past 是过去时,那么应该用had呀,怎么用现在完成时呢?
1先不看单数还是复数,从句子就看出是一般现在时态,表明一种状态,所以选B,flower是可数的 ,一朵花也可以说成a flower
2这里时间状语应该是In the past few years ,而不仅仅是in the past,而 In the past few years 意思是“在过去几年以来（也就是和现在产生关系）”,常常和现在完成时态连用
2这里时间状语应该是In the past few years ,而不仅仅是in the past,而 In the past few years 意思是“在过去几年以来（也就是和现在产生关系）”,常常和现在完成时态连用
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