Look! the ground is wet. It must have rained last night, _______?

1. A.
   hasn’t it
2. B.
   didn’t it
3. C.
   mustn’t it
4. D.
   hadn’t it

Look! the ground is wet. It must have rained last night, _______?

The Ground is wet all over, so it must have rained last night, ________?

1. A.
   mustn’t it
2. B.
   wasn’t it
3. C.
   hasn’t it
4. D.
   didn’t it