----- John looks a bit upset. Did you tell him the bad news?

------Yes, but I _____him after his birthday party.

A．should have told

B．must have told

C．shouldn’t have told

D．needn’t have told

抹灰工程应分层进行，当抹灰总厚度大于等于35㎜时应采用（）。不同材料基体交接处表面的抹灰，应采取（），当用加强网时，网与各基体的搭接宽度不应小于100㎜。