He built a telescope ____ he could study the skies in his free time.

The day ____ (在那天我第一次遇见他)was the first of May on the Great Wall.

"Thelecturerwasatallthinmanwithwhitehair.""Thenit_______Dr.Fellbecauseheisshortandfat.It_____Dr.Jones;heisthin."

The primary school ____ (在孩提时代我在那里学习)had very little equipment.

As is known to us all,the age_____children can go to school is seven.