单项选择题
As we can see, the bridge is made ______ stone.
单项选择题 In order to finish the work in time, they always worked far ______ the night.
单项选择题 The struggle against sand storm will not end ______ victory unless we pay much attention to the balance of nature.
单项选择题 Was this piece of earthenware(陶器) made ______ machine or ______ hand
