2. 外语
  3. Under no circumstances______without looking carefully to the rear.

Under no circumstances______without looking carefully to the rear.

admin2019-07-01  39
问题 Under no circumstances______without looking carefully to the rear.
选项 A、should one back up a motor vehicle
B、a motor vehicle should back up
C、one should back up a motor vehicle
D、should back up a motor vehicle
答案A
解析 After the introductory negative under no circumstances, the subject and verb are inverted: should one back up a motor vehicle.
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