Would you please lend me some paper—Sorry, but we have all the paper.

The woman pulled her hat low down ____ her eyes in order not to be recognized by the angry crowds.[ ]

There are a great number of natural resources in the desert，which remain to be ________.[ ]

I am glad that the Olympic Games will be held in 2008 in China, _______ ?

There are now many museums showing ______life was like back then.