_____ to improving services, we will provide customers with all the information they need.
A．Being committedB．Having committed
C．CommittedD．Committing
C

試題分析： 句意：承諾要提高服務(wù)，我們會給顧客提供他們需要的信息。Be committed to doing sth承諾做…，用過去分詞做狀語，相當于Because we are committed to improving services，選C。
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