It is such a modem machine few of the workers know how to operate it.A. whichB. thatC. asD

问题补充：

It is such a modem machine few of the workers know how to operate it.

A. which

B. that

C. as

D. the one

答案：

A. which

(答案→)B. that

C. as

D. the one

解析：考查定语从句。such修饰先行词时，定语从句引导词用that或as。当从句不缺少成分时，用that，从句缺少成分时，用as作主语或宾语。句意“它是一台如此时新的机器，以至于这些工人中几乎没有人会操作它。”从句不缺少成分，用that。故选B。