The first thing ________ we should do is to master the basic grammar.
________ all over the hills and around the lake are wild flowers of different kinds.
Although he sometimes loses his temper, his students like him ________ for it.
.Professor Zhang gave all the textbooks to all the pupils, except _____ who had already taken them.
Do you think the reason ________ he gave is believable?
________ he is ,he seldom shows his precious coins to others.