Theofairalsoexplainswhythestarsdon'tseemtotwinkleinspace.A.absenceB.absentC.presentD.presence

Question

The ________ of air also explains why the stars don't seem to twinkle in space.

A. absence           B. absent

C. present           D. presence

Answer 1

A　

absence“缺乏；缺少；缺席”。