The man stopped from time to time_______whether he was being followed.
| A．as if found | B．as to find | C．as if to find | D．when found |
55. I can’t see John anywhere. Where _____ he have gone?
| A．may | B．can | C．might | D．Should |
54. Extensive tests have been on the patient.
| A．carried on | B．carried out | C．carried off | D．carried away |
53. She_______most of the prizes for swimming.
| A．carried on | B．was giving off | C．showed off | D．carried off |
52. Don’t worry. Your child is old enough to___________himself.
| A．take care of | B．care for | C．looking after | D．pay attention to |
51. --- There were already five people in the car but they managed to take me as well.
--- It _____ a comfortable journey.
| A．can’t be | B．shouldn’t be | C．mustn’t be | D．couldn’t have been |