He was busy writing the essay all the morning, only______occasionally to have a cup of tea.
【正确答案】 A
【答案解析】本题空格处是说仅仅偶尔停下来喝杯茶。A项breaking off“中断”符合题意。其他三项breaking out“爆发”,breaking“打破,弄坏”,breaking away“逃脱”都不正确。