这起事故必须仔细调查。译文：________________________________.
A: The accident must investigated carefully
B: The accident must be investigated carefully
C: The accident must investigating
D: The accident must be investigating
A: The accident must investigated carefully
B: The accident must be investigated carefully
C: The accident must investigating
D: The accident must be investigating
举一反三
- He must have had an accident, or he _____ then.
- The old man is quite weak after the accident, so he ___ . A: must take care of B: must be take care of C: must look after D: must be looked after
- The old man was quite weak after the accident , so he . A: must be take care of B: must take care of C: must be looked afte D: must look afte
- The old man was quite weak after the accident, so he ______. A: must look after B: must be taken care C: C. must be looked after
- He said that the driver must have had an accident, otherwise he _______ by then.