中国大学MOOC: It _______ rained last night, for the road is wet and slippery.
举一反三
- It _______ rained last night, for the road is wet and slippery. A: must B: / C: must have D: could have
- Had it rained last night, the road _____ wet now. A: would be B: must be C: would have been D: must have been
- 中国大学MOOC: -----It rained a lot last night. ----There was rain last night
- It must have rained last night, ______ the ground is wet this morning. A: because B: but C: for D: or
- It must have rained last night, ___ it is wet all over A: so B: for C: but D: and