监测项目合同鉴定后，承包单位在进场前必须向监理人呈报进驻工地的监测专家和主要人员的名单，经监理人审批后方可进驻。
参考答案：对
The parents were unsettled for the first few days, _____ about their son's safety. [ ]
A. having worried
B. to worry
C. being worried
D. worried
蓝宝石的主要产地有（）
A.缅甸
B.泰国
C.越南
D.日本
