I don’t know when he _____ next week. When he_____, please let me know.

don’t know why he has been absent _______ class for so long.

The question that puzzled us is _____ we can get rid of the air pollution in the area.

sterpiece “Guernica”, ________ by Picasso, is permanently exhibited in Madrid.

–Will you go to the exhibition tomorrow—Yes I will go ____it’s windy