问题
选择题
_____ to improving services, we will provide customers with all the information they need.
A．Being committed
B．Having committed
C．Committed
D．Committing
答案
答案：C
题目分析： 句意：承诺要提高服务，我们会给顾客提供他们需要的信息。Be committed to doing sth承诺做…，用过去分词做状语，相当于Because we are committed to improving services，选C。