the plant being built is a steel

the river ____ ____ a new bridge is being built is 209metres The river on which a new bridge is being built is 209 meters The house 什么 is being built is near the factory. The old school ＿＿＿(pull)down.A new school is being built. school is being built,it is in a m_________. What's the bid building that is being built for? The palace is being built.一个语法问题 the building being built is our library这个句子对吗? A stellworks is being built .stellwork 为什么加s a new gymnasium is being built in our neighborhood 1.（）is being built. （ ）A bridge_____last years.A.has been built B.is being built