【单选题】He is said___________a book on the history of Chinese tone bridge , but I don’t know if he has finished it.
B.
to be writing C . having writing D writing
【单选题】( )是指工程材料由来源地(或交货地)到达工地仓库(或工地堆放点)后的出库价格:
【单选题】材料预算价格是指材料由来源地或交货地点,经中间转运到达工地仓库或施工现场堆放地点后的()价格?
【单选题】______ he wanted to go out with his friends at the weekend, he had to stay behind to finish his assignment.
【判断题】材料预算价格是指材料由其来源地或交货地点到达工地仓库存放后的平均出库价格,它是消耗在单位材料上各项费用的总和。
【单选题】He______ the work yesterday, but he didn't.