Building a house is an operation which costs quite a lot of money.的全文

Building a house is an operation which costs quite a lot of money．Suppose you plan to

  1   a house，your first step is to find a suitable piece of 2  ，You will probably try to find a sunny place，in a   3   situation，near stores and bus stops，not too far from your friends and the place where you work．

Next you will find an   4   builder．And together with the builder you will make a

  5  ，The builder will draw it．The builder will also   6  the cost of your house．He will estimate（估计）the cost of the wood，the glass，and everything else that he must use in building the house．Later on，when he starts to build，this estimate must  7  ，because the prices may

   8 ，and many other thing may happen between the time when he makes the estimate and the time when he builds the house．

  9  &