— _________, this math problem seemed quite simple to me, but when I tried to work it out, I just couldn’t.

— There are always things like this, I think.

A．On one hand

B．In my opinion

C．At first sight

D．On its own

下列哪项不属于梦的工作？（）

A.凝缩

B.自由联想

C.转移

D.象征

E.特殊表现力