My sister is expecting me,____ I must be off now

Shanghai authorities have guaranteed the quality of the city’s drinking water _____ more than 7500 rotting pigs ______ floating on the Huangpu River in the past week.

Lao She’s Teahouse ______ the changes in Chinese society over fifty years.

Morgan, could you tell me _____________—In the Mexican city of Cancun.

a mystery and a shock to all who knew him that he____ have taken his own life in this way.—What a pity, indeed.