When does the new system go into effect?
A．Immediately.
B．From next week.
C．From next month.
D．After management decides.

A.Immediately.
B．From
B.
C．From
C.
D．After

【参考答案】

A
解析：从from now on可以知道，正确应该是意义与之相近的Immediately(马上)。