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[主观题]
It______for three days and nights now, so the postman is an hour late this morning.A.has b
It______for three days and nights now, so the postman is an hour late this morning.
A.has been snowing
B.is snowing
C.had snowed
D.had been snowing
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It______for three days and nights now, so the postman is an hour late this morning.
A.has been snowing
B.is snowing
C.had snowed
D.had been snowing
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