对于工程项目工作范围的变更，必须由( )发出正式变更令。
A．业主B．业主代表C．咨询工程师D．承包商
参考答案：A
The representatives were discussing the 11th fiveyear plan that they would like to see ______ the
next year.[ ]
A. carry out
B. carrying out
C. carried out
D. to carry out
加快试点和实施“康居工程”，降低（）家庭购置初步改善性质普通商品房成本。
A.中等收入
B.高收入
C.低收入
D.贫困
