Question

Not until the car looked almost new____ cleaning it.

1. A.
   John stopped
2. B.
   did John stop
3. C.
   stopped John
4. D.
   John did stop

Answer 1

B
考查倒装句。Not until 放在句首时用部分倒装，从句不倒装，主句倒装，根据语境应用过去式，句意：直到这辆车看起来几乎是新的，约翰才停止了擦车。故选B。