用关系副词when, where或why完成下列句子。

This was the reason ________ he was late for class.

用关系副词when, where或why完成下列句子。

I walked in our garden, ________ Tom and Jim were tying a big sign onto one of the trees.

用关系副词when, where或why完成下列句子。

We will be shown around the city: schools, museums, and some other places, ________ other visitors seldom go.

用关系副词when, where或why完成下列句子。

There were dirty marks on her trousers ________ she had wiped her hands.

用关系副词when, where或why完成下列句子。

We are living in an age ________ many things are done on computer.