It is a great ______ for us to be invited here to meet the great scientist face to face.
Generally speaking, green products refer to all goods that are environmentally______.
After his wife was killed in the earthquake, it was his daughter _____ managed the house and accompanied him
Make sure to turn off the gas after you take a bath, which would ___ cause danger.
Mo Yan, _______penname means “Don’t speak”, won the 2012 Nobel Prize in literature.
Students urged that the school library ______open during the long vacation.