小溪流水不止息奔向大海是一种坚持;野草冲破乱石钻土而出是一种坚持;____。
用竖式计算。
①47+26= ②66-48= ③100-55=
④28+69= ⑤72-46= ⑥37+63=
When the meeting was ________, they all ________ to their feet and left.