1) The blackboard and chalk _______________(正在被电脑和投影机所取代).
2) The book _______________(到今年年底就将已出版).
3) Computer models _______________(可以用来演示细胞工作的方式).
4) When the bill of fare was brought, _______________(我惊呆了,价格大大超出了我的预料).
5) _______________(必须立即采取有效措施)to eliminate sandy storms.