When the seriously injured boy was taken to a ______ hospital, he was half conscious; while lying in bed, he heard a voice _______ calling him.
Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
Professor Zhang gave all the textbooks to all the pupils, except ________ who had already taken them.
Although he sometimes loses his temper, his students like him ________ for it.
.________ all over the hills and around the lake are wild flowers of different kinds.
I think that this meal was well worth ________ was charged for it.