请教NN单复数的两个问题

1.        With its abundance of noun inflections, Icelandic is one of several Germanic languages that is compact when written but can lengthen considerably when translated into English.

(A) is compact when written but can lengthen considerably when translated into English

(B) are compact when they are written, but they can lengthen considerably when they are translated in English

(C) is compact when written but can lengthen considerably when being translated into English

(D) are compact when written but can lengthen considerably in English translation

(E) is compact when it is written but can lengthen considerably when translated in English

答案是D，到底One of sths that 后面的谓语用单数还是复数？

2.        Virtually undisturbed for the last three centuries on their starkly beautiful islands near the edge of the Arctic Circle, the inhabitants of the Lofotens have evolved folkways and a life-style that bring warmth to their harsh environment.

(A) the inhabitants of the Lofotens have evolved folkways and a life-style that bring warmth

(B) the inhabitants of the Lofotens have evolved folkways and a life-style that brings warmth

(C) evolving folkways and a life-style were evolved by the Lofotens inhabitants to bring warmth

(D) evolving folkways and a life-style brought warmth to the Lofotens’ inhabitants as well as

(E) warmth-bringing folkways and life-styles have been evolved by the inhabitants of the Lofotens

1, 中心词，一般取sths。

2，folkways and a life-style 并列主语。