Hebuiltatelescope____hecouldstudytheskiesinhisfreetime.
through which
暂无解析
He has four son,____ (他们全部都是那个偏僻山村里的高级教师)。
He borrowed a book the other day ， the author ____ is a worker.
Everybodyhasarrived.It'stimewe____.
.Look,they are climbing up a mountain,____ (在它顶上屹立着一座古老庙宇)。
Last night he saw two dark _____ enter the building, and then there was the explosion.
