新概念英语2册48课问题。

Meanwhile,my tongue was busy searching out the hole where the tooth had been.
请问这里的where引导的是什么从句
where the tooth had been.后面怎么没有宾语啊？

where引导的 是定语从句 修饰先行词hole ，意思是说the tooth had been in the hole.
关系副词where =in which ,
因此这句话也可以说：
Meanwhile,my tongue was busy searching out the hole which the tooth had been in.

48的答案是 a 1 the aeroplane is flying over the village. 2 the ship is going under the bridge. 3 the children are swimming across the river. 4 two cats are running along the wall. 5 the boy is jumping off the branch. 6 the girl is sitting between her mother and her father. 7 the teacher is standing in front of the blackboard. 8 the blackboard is behind the teacher.b 1 do you like honey? yes, i do. i like honey, but i don't want any. 2 do you like bananas? yes, i do. i like bananas, but i don't want one. 3 do you like jam? yes, i do. i like jam, but i don't want any. 4 do you like oranges? yes, i do. i like oranges, but i don't want one. 5 do you like ice cream? yes, i do. i like ice cream, but i don't want any. 6 do you like whisky? yes, i do. i like whisky, but i don't want any. 7 do you like apples? yes, i do. i like apples, but i don't want one. 8 do you like wine? yes, i do. i like wine, but i don't want any. 9 do you like biscuits? yes, i do. i like biscuits, but i don't want one. 10 do you like beer? yes, i do. i like beer, but i don't want any. 第48课 1.over 2.under 3.across 4.along 5.off 6 between 7.in front of 8 .behind