新prep1-193

193.
            (27023-!-item-!-188;#058&002210)

New equipment and other improvements reduced the amount of time—from eleven hours in 1982 to six in 1988—needed by workers so that they could produce a ton of steel.  B   D 

A. needed by workers so that they could produce

B. needed when workers are producing

C. workers need in producing

D. workers needed to produce

E. workers need for their producing of

time后面跟的是workers needed to produce 难道定语从句后面的that可以不要么

定语从句中that能省略的。

引导词若是在定语从句中做宾语，一般都是省略的。

A错在没有因果关系  B错在时态

所以只能在CDE里考虑