— （) — Once a week.

A．Once a week.B．Once a month.C．Once every two weeks.D．Twice a week.

The windows of the room （) once a week.A、has been cleanedB、is cleanedC、are cleanedD、are

What is the main idea of the news item？A．Fewer people watch TV once a week.B．Smartphones a

— ___________________— Once or twice a week.A How

完形填空。 I once had a teacher whose husband died suddenly of heart attack.About a week after his de

A man once said how useless it was to put advertisements in the newspaper. “Last week ” he said “m