I have been told that the new law will e into on January 1st next year.
A. effect
B. use
C. service
D. existence
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(答案→)A. effect
B. use
C. service
D. existence
解析：词义辨析。Effect效果，影响；use用处；service 服务；existence存在。句意：我已经被告诉新法律将在明年一月一日开始生效。所以选A，e into effect ，生效。