The general election in Britain is held every ______ years.

单项选择题Ezra Pound’s major work of poetry is the long poem called

单项选择题The ______ are the fastest growing racial and ethnic group in the United States.

单项选择题______ is the heart of century-old French presence in North America.

单项选择题The term Father of Waters is used to refer to ______ in the US.