【正确答案】:
FROM GROUP 1, WE CAN FIND THAT EVERY COMPOUND SHOULD EXPRESS A SINGLE IDEA JUST AS ONE WORD. "RED MEAT" REFERS TO BEEF OR LAMB RATHER THAN ANY MEAT THAT IS RED IN COLOR; "HOT DOG" IS BY NO MEANS A DOG THAT IS HOT, BUT A TYPICAL AMERICAN SAUSAGE IN BETWEEN TWO PIECES OF BREAD. 
GROUP 2 SUGGESTS THAT A COMPOUND TENDS TO PLAY A SINGLE GRAMMATICAL ROLE IN A SENTENCE. "BAD-MOUTH" USED AS A VERB TAKES THE PAST TENSE MARKER-ED; "MAJOR GENERALS" USED AS A NOUN, TAKES THE PLURAL FORM. 
【题目解析】:第一组中,我们可以发现每个复合词都应该以一个词的形式表达一个单一的概念。”“Red meat”指的是牛肉或羊肉,而不是任何一种红色的肉,“hot dog”决不是一种热的狗,而是一种典型的夹在两片面包中间的美国香肠。第二组词认为复合词在句子中倾向于扮演一个单一的语法角色。“Bad-mouth(说(人)坏话)”作为动词,可以用过去时态标记-ed;“major generals(少将)”作为名词,可以用复数形式。