問題詳情：
It’s time to start the meeting, but the boss _____ yet.
A. hasn’t arrived B. won’t arrive C. doesn’t arrive
【回答】
A
【解析】句意：到了開始會議的時候了，但是老闆還沒有來。根據yet可知此處用現在完成時have done，
故選A。
知識點：動詞時態
題型：選擇題
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