He _____in London for many years, but he has never regretted his final decision to move back to China.

A．lived

B．was living

C．have lived

D．had lived

全国人民代表大会常务委员会对国务院制定的同宪法相抵触的行政法规( )。

A．有权改变或撤销

B．有权撤销，无权改变

C．有权改变，无权撤销

D．无权撤销，无权改变