did you save the drowninggirl, ________ parents were both professors—It was from the lake ______ she oftenwent fishing.

We don’t have any problems _______ the big box.

The question that puzzled them is ____ they can get rid of the air pollution in the area.

Not until recently _______the development of tourist-related activities in the rural areas.

I’m not sure whether be has finished writing the book, but he________ it last month