It was a nice house, but _____ too small for a family of live [ ]

Nowadays some hospitals refer to patients _____ name, not case number[ ]

The central heating system of this office building isdown and several workers ______ it right now

Last March, many trees ________ along the streets to make our city more beautiful.

－Food safety is a big problem now.－______, the government has taken some steps to solve it.