we want to know is whether we must finish the work you assigned last week.A. What; that

问题补充：

we want to know is whether we must finish the work you assigned last week.

A. What; that

B. What; what

C. That; what

D. That; where

答案：

(答案→)A. What; that

B. What; what

C. That; what

D. That; where

解析：句意：我们要知道的是是否我们必须完成这项你上周分配的工作。这里第一空是what引导的主语从句，它在从句中做主语；that在主语从句中不作成分，故排除CD；第二空是that引导的定语从句，先行词是work，关系词在从句中作宾语，what不能引导定语从句，故排除B。故选A。