He transplanted the rare flowers to the botany garden_______it was the best time for them.
The human body consists of organs, each ____a definite job to do.
—Why does the river smell terrible —Because large quantities of water________.
The horse covered the distance in six days_____ the train's 28 hours.
---We need a person very much to think up a creative idea. --- ______ the new manager have a try?
The young man, who by then ___ admission to Peking University, determined to do some part-time jobs to gain more practical skills.