Let’s look at pictures _____ Beijing Opera.[ ]

As the busiest woman in the village, she made _____ her duty to look after all the other people’s affairs in that village.

Where ___________ you go yesterday? —I ___________ to the beach.

Look at that girl. Is it Susan?–No, it _______ be her. She has gone back to her home town .

Are Mr. and Mrs. Wang living alone in the house? —Yes, they have three sons, but ______ of them live in their own houses.