The alarm clock didn't ring this morning. I （） it last night.
A: did forgotten to wind
B: may have forgotten winding
C: ought to have forgotten to wind
D: must have forgotten to wind
A: did forgotten to wind
B: may have forgotten winding
C: ought to have forgotten to wind
D: must have forgotten to wind
举一反三
- I could_____ make it to the classroom on time this morning for I had forgotten to windup the alarm clock last night. A: surely B: barely C: seldom D: rarely
- ______ his telephone number, she didn't know how to get in touch with him. A: Having forgotten B: Forgetting C: To have forgotten D: To forget
- Before long, he ________ all about the matter. A: will have forgotten B: will forget C: will have been forgotten D: will be forgetting
- It was an island. I have forgotten its name. (whose)
- My sister must have forgotten （）gasoline in the car A: to putting B: to have put C: putting D: to put