Marie is very wet.She ____ in the river:can have fallen B:had to fall C:must have fallen D:needn't to fall

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Marie is very wet.She ____ in the river:can have fallen B:had to fall C:must have fallen D:needn't to fall
Marie is very wet.She ____ in the river
:can have fallen
B:had to fall
C:must have fallen
D:needn't to fall

Marie is very wet.She ____ in the river:can have fallen B:had to fall C:must have fallen D:needn't to fall
c
mary湿透了,她一定是掉到河里了.
表示肯定的推测.

C
对过去事实的肯定推断

C

C 表示肯定的推测....