It seems that the old man _____ something important.A has lost B had lost C lost D would lose应该选什么,并将每个选项解释一下.

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It seems that the old man _____ something important.A has lost B had lost C lost D would lose应该选什么,并将每个选项解释一下.

It seems that the old man _____ something important.A has lost B had lost C lost D would lose应该选什么,并将每个选项解释一下.
It seems that the old man _____ something important.A has lost B had lost C lost D would lose
应该选什么,并将每个选项解释一下.

It seems that the old man _____ something important.A has lost B had lost C lost D would lose应该选什么,并将每个选项解释一下.
a 现在完成时表示现在已经丢失并对现在产生的影响 选A、
B是过去完成时不行,因为seems是现在时态
C一般过去时,只是强调过去发生的事情
D过去将来时表示还没有发生,这里已经发生了