21． Now that you are an adult, you should draw a/an _______ between right and wrong．
A． thought B． distinction C． conclusion D． idea
22．The Spanish and Portuguese ________ had a profound effect upon the general mentality (思想) of Latin．
A． customs B． civilization C． cultures D． habits
23．It was with great joy ______ he received the news ______ his lost son would soon return home．
A． that, when B． that, which C． which, which D． that, that
