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----When does your mother go shopping?----Usually _____ Sunday morning.

— When does your mother go shopping? 

—Usually         Sunday mornings.

A. in　          B. on　             C. with         D. at

— When does your mother go shopping? 

—Usually         Sunday mornings.

A. in　          B. on　             C. with         D. at

—_____ does your mother go to work every morning?

    —At eight o’clock.

A.        When         B. Why              C. Where            D. How