The ground is wet, it ( ) last night.
A: must rain
B: must have rained
C: is raining
D: could have rained
A: must rain
B: must have rained
C: is raining
D: could have rained
举一反三
- Since the ground is wet, it ______ last night. A: must rain B: must have rained C: had rained D: rained
- Since the ground is wet, it ______ last night. A: [A]must have rained B: had rained C: must rain
- The streets are wet, it ______ last night. A: rain B: must rain C: has rained D: must have rained
- It _______ rained last night, for the road is wet and slippery. A: must B: / C: must have D: could have
- It must have rained last night, ______ the ground is wet this morning. A: because B: but C: for D: or