Mr Green isnot at work.He is ( )vacation.A for;B on;C during;D at.要求说明原因.

问题描述:

Mr Green isnot at work.He is ( )vacation.
A for;B on;C during;D at.
要求说明原因.

答案是ON
全文意思是:格林先生现在没上班,他度假去了。
On vacation 表示状态,在度假

on
on vacation固定搭配,在度假