单词“cat”以字母“C”开头。

The word "cat" ___begins ___with the letter "C."

每一章都应该以一个清晰的主题句开始。

Every chapter should ___begin ___with a clear topic sentence.

昨天的会议以我们经理的简短介绍开始。

The meeting yesterday ___began ___with a brief introduction from our manager.