We had to wait half an hour we had already booked(预定) a table.
There are no ____ (bridge) over the river.
发展社会主义民主政治的基础性工程,也是人民当家作主有效的途径是（ ）
某个机器功率大，是指这个机器做功____ 。（选填“快”或“慢”）
