請把選項中文法錯誤的挑出來
The electric furnace
(A) is used extensively
(B) to produce the high-grade steel is required
(C) for the manufacture
(D) of steel alloys.

答案：登入後查看
統計： A(21), B(74), C(36), D(3), E(0) #324857

stone

B2 · 2012/04/16

#316818

只有 required，不需 is
或加上 that 變成子句：that is required

Gordon Huang

B1 · 2012/02/29

#276485

C) of the manufacture

Paul Shih

B3 · 2012/09/22

#458100

答案 C 應該改成 B
==> is required 應該改成 required

【站僕】摩檸Morning.

B4 · 2013/04/26

#604556

原本答案為C,修改為B

(共 13 字，隱藏中）

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