1.The Science Museum ,【】we visited during a recent trip to B
1.The Science Museum ,【】we visited during a recent trip to Britan,is one of London 's tourist attractions.此处为何填which而非where?请说明
2.After 【】seemed half an hour,he came back.
.After 【】seemed a very long time ,the wounded soldier came back to life.
What can I learn from 【】happened?此【】应填what?是什么从句和什么语法呢?
3.I don't know what is to be 【】(处理)this.【】处填一短语,“what is to be 【】(处理)this”感觉很奇怪,
which 可引导非限 但我觉得填 where 貌似也对,非限只能用which引导么?