Complete the sentences with the words below. Change the form if necessary.affiliation ascribe categorize consequencefoster multilingual rivalry trait1. She said exactly what she thought, without thinking about the ________.2. In general, shyness is a personality ________ that is partly biological and partly environmental.3. International travel has grown to the point that many hotels find it necessary to employ ________ staff members.4. I can only ________ the uncommon behavior of the strangers I meet to my being a foreigner.

我们来逐题分析并完成句子。题目要求使用下面的单词填空，必要时可改变词形：

提供的单词有：
affiliation, ascribe, categorize, consequence, foster, multilingual, rivalry, trait

第1句：
She said exactly what she thought, without thinking about the _____.
她说了她所想的，而没有考虑____。

分析：
这句话的意思是“她直言不讳，没有考虑后果”。因此，空格应填“后果”或“结果”。
从词汇表中，“consequence” 意为“后果，结果”，符合语境。

答案：consequence
句子完整为：She said exactly what she thought, without thinking about the consequence.

第2句：
In general, shyness is a personality ______ that is partly biological and partly environmental.
一般来说，害羞是一种性格______，部分源于生物因素，部分源于环境。

分析：
“性格特征”在英文中常用 “personality trait” 表达。
“trait” 意为“特质，特点”，正好匹配。

答案：trait
句子完整为：In general, shyness is a personality trait that is partly biological and partly environmental.

第3句：
International travel has grown to the point that many hotels find it necessary to employ ______ staff members.
国际旅行发展到这样一个地步，许多酒店发现有必要雇佣________员工。

分析：
由于国际旅客来自不同国家，说不同语言，因此酒店需要能说多种语言的员工。
“multilingual” 意为“会说多种语言的”，修饰 staff members，符合语境。

答案：multilingual
句子完整为：International travel has grown to the point that many hotels find it necessary to employ multilingual staff members.

第4句：
I can only ______ the uncommon behavior of the strangers I meet to my being a foreigner.
我只能把遇到的陌生人的异常行为________于我是个外国人。

分析：
句型 “ascribe ... to ...” 是固定搭配，意为“把……归因于……”。
这里的意思是“我把陌生人的异常行为归因于我是个外国人”。
因此，应使用 “ascribe” 的原形（情态动词 can 后接动词原形）。

答案：ascribe
句子完整为：I can only ascribe the uncommon behavior of the strangers I meet to my being a foreigner.

最终答案：

1. consequence
2. trait
3. multilingual
4. ascribe

\boxed{
\begin{aligned}&1.\ \text{consequence} \\&2.\ \text{trait} \\&3.\ \text{multilingual} \\&4.\ \text{ascribe}\end{aligned}
}