With so many people ______ in the mine(矿), none of the rescue workers would stop to have a rest.
—Why not go travelling?— I can’t afford it. _____ the cost, it will take a lot of time.
—The bookshelf fell down itself.—I know. Neither he nor you ____.
Only if you work hard _____, because hard work is the ultimate source of success.
The _____ look on his face suggested that the teacher was quite _____ with the result.
______, I came to realize that my parents could not always stand by me.