行为人由于认识错误而实施的违反刑法规定的行为，其犯罪行为的主观方面应当是( )。

A．故意犯罪

B．过失犯罪

C．不构成犯罪

D．可能是故意也可能是过失犯罪

. The young teacher found it hard to _____ his explanation in class most of the time.

A. go through          B. pull through        C come acmes        D. get across