题目内容
Being ______ (全神贯注于) his study, he was unaware of the passage of time.
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Why does the writer say most American TV commercials succeed in achieving their main aim
试述广播电视媒介的管理特性。
The Oscars Awards usually have a ______ system which means to keep the results until the last moment.
Why does the writer use "reveled in" in paragraph 3 to describe the viewers watching a TV commercial
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