处理人际关系的语言要求是()。
A. 原则性与灵活性相统一
B. 事理性与情感性的统一
C. 规范性与变异性的统一
D. 以上都是
I like playing football ______ he likes playing basketball .
A. when
B. because
C. while
D. as
I do not like the color of my new bike _____ it runs really fast .
A. though
B. because
C. if
D. or