A helicopter had flown overhead. 在这句话中,flown 的动词原形是______
举一反三
- She has never _____ on a plane. A: flown B: flew
- The predetermined overhead rate is calculated as A: actual overhead divided by estimated activity level. B: estimated activity level divided by estimated overhead. C: estimated overhead divided by estimated activity level. D: actual activity level multiplied by estimated overhead.
- Ann thought she would be frightened because（） A: she had never flown before B: she had a fear of being in high places C: she hadn' t made proper preparations. D: she was naturally timid
- The captain suggested that the flight ______ to the alternate airport. A: flies B: fly C: flew D: flown
- 21. “Have you ever______in an airplane?”(本题1.0分) A、 Flying B、 flew C、 flowed D、 flown