The dentist gave me a shot which took almost immediately and I didn't feel a thing.
A. offense
B. charge
C. action
D. effect
网友回答
A. offense
B. charge
C. action
(答案→)D. effect
解析： 句意：牙医给我打了一针，它几乎立刻就生效了我什么也感觉不到了。四个选项的含义分别是：A. offense冒犯，B. charge 负责，C. action行动，D. effect影响，效果，而take effect是“生效”的意思，所以选D。