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Furniture and flooring usually come to mind when we think of ways to use bamboo. Not many of us, ________, think of bamboo clothing.

Pieces of bamboo or wood ________ books between 2^nd and 5^th century AD.
A. used to formed       B. used to form
C. were used to form    D. used to beforming

Simon made a big bamboo box _______ the little sick bird till it could fly.

The paper _____ bamboo is made is especially fine.

   A. which         B. into which        C. of which       D. from which

It’s a little surprising that a house made of wood or bamboo may stay up in an earthquake while _______ made of steel and concrete may fall down.