井点降水方法中属于真空抽水的是（）
A.轻型井点和喷射井点
B.轻型井点和管井井点
C.喷射井点和管井井点
D.管井井点和深井井点
参考答案：A
They_____five days finishing the work. [ ]
A. paid
B. took
C. spent
In relation to the law of obligations:
(a) Explain the provisions of the Civil Code in respect of the time limit for performing civil obligations. (3 marks)
