Can you imagine John _____ his work ahead of time though he had three days off? [ ]

A. finish

B. finishing

C. to finish

D. to have finished

当承包商提交的进场材料出厂合格证及检验、试验报告不足以说明进场材料符合要求时、监理工程师可( )。

A．要求承包商将该材料运出现场

B．再组织复验或见证取样试验

C．亲自对该材料进行抽样检验

D．向承包商下达停工指令