(天津卷11). Joining the firm as a clerk, he got rapid promotion, and _______ as a manager.
---- How long ____ at this job? ---- Since 1990.
---- Do you know our hometown at all? ---- No, this is the first time I ____ here.
They won the game, _______ made their team leader proud of them.
The first thing ________ we should do is to master the basic grammar.
Diamond, _________, is the hardest of all materials.