问题
单项选择题
Palmer and some other linguists of his time believed that ______ played one of the most important roles in foreign language learning.
A. grammar
B. phonetics
C. vocabulary
D. rhetoric
答案
参考答案：C
解析： 帕尔默和当时其他的一些语言学家都认为词汇在外语学习中的地位非常重要。