When television was first introduced, the extent _______ it would affect society could not have been foreseen.

Finally he reached a lonely island ________ was completely cut off from the outside world.

He bought a house,___________  the price is reasonable.

September 18, 1937 is a day _______ all Chinese will remember forever.

Is this the reason ______ at the meeting for his carelessness in his work?

In learning English they’ve reached a degree       they can read foreign newspapers and magazines in almost a free way.

Many children, _________ parents are away working in big cities, are taken good care of in the village.