This nationwide smog should serve as a reminder to all, indicating a high time that we ______ on what we've done to the environment.
______ history of the Qing Dynasty is _____ history of suffering, also one of being bullied and invaded(欺侮和侵略).
Modern equipment and no smoking are two of the things I like ______ working here. But whether to stay or leave is ___________.
—Where have you been?— I ______ in the heavy traffic. Otherwise I ______ here earlier.
His feature story opens and closes with descriptions of two new reports, each _____ one major point in contrast with the other.
In _____ Chinese culture, marriage decisions were often made by parents for their children.