Yesterday morning in a city in the USA, a crowd of dustmen went on a strike to ______ complaints about their low pay．

has been popular _______ alot of children since the year before last

The girl is afraid of dark, so she goes to bed____ the lights on.

What game is popular withthem—- The ____ most is tennis.

He visited the Effel Tower, which _____ to 1889, during his stay in France last summer.