中国大学MOOC: -----It rained a lot last night. ----There was rain last night
举一反三
- 中国大学MOOC: It _______ rained last night, for the road is wet and slippery.
- ____ it ____ last night? A: Do; rain B: Does; rain C: Did; rained D: Did; rain
- If it had rained last night, the roads wet.
- It must have rained last night,________the ground is wet.
- The streets are wet, it ______ last night. A: rain B: must rain C: has rained D: must have rained