找出划线部分发音与其它三个不同的选项。

1．A．calm                     B．ball                      C．wall                       D．call

2．A．loud                      B．house                  C．though                   D．outgoing

3．A．gift                       B．sick                      C．win                     D．wild

4．A．bread                    B．seal                     C．dream                    D．seat

5．A．born                      B．perform               C．for                       D．worst