问题
选择题
He appears to be optimistic, but, ______, he is quite pessimistic.
A．in particular
B．on one hand
C．for one thing
D．as a matter of fact
答案
答案：D
考查短语辨析。in particular 特别地，on one hand 一方面，for one thing 首先，as a matter of fact 事实上，句意：他似乎很乐观，但是事实上他非常地悲观。所以选D。