Question

托福语法

Seldom ___ games been of pratical use in playing real games.
A. theories of mathematics
B. theorized as mathematics
C. has the mathematical theory of
D. the mathematical theory has
这个答案上给的是C，可是这个应该怎么解释？ 求解，谢谢

Answer 1

填 A， B ，句子的谓语动词不完整，只有 been，缺少 “verb to have”的相应字；
填 D，出现莫明其妙的谓语 “…themathematical theory has games been”，把“games”
如此插入 “has been”中是不符合语法的。
填 C，…… has the mathematical theory of games been……
是部分倒装的句子，可还原为：
Seldom the mathematical theory of games has been of ……
句子通顺符合文法。

Answer 2

seldom含有否定意思，意思是“极少数情况的”。否定词在句子开头应该倒装，只有c的结构符合倒装结构。这句话非倒装语序是the mathematical theory of games has seldom been of practial use in playing real games.