Our job is with _______ hours: one can work in the morning or in the afternoon, so long as work for no less than five hours every day.
Young people tend to get up very late unless ________ to rise early.
No reader ________ take away a book from the library without the permission of the librarian.
. --Did you see ________ may be the longest total solar eclipse (日全食)in 500 years yesterday? --No, it was cloudy above my city at that time.
________ a two-year period, Nancy became addicted to painkillers (止疼药).
. At noon in summer the villagers like to seek shade ________ the air is cooler.