从下列各题的四个选项中，找出与所给单词的划线部分读音完全相同的选项。

1．surface

       A．face                    B．base                    C．necklace              D．mistake

2．strong

       A．longer                 B．single                  C．singer                 D．younger

3．Monday

       A．stay                    B．holiday                C．days                   D．sway

4．courage

       A．cousin                 B．count                  C．youth                  D．cough

5．pleasure

       A．expression           B．musician              C．ocean                  D．conclusion