下列省区中互为邻省的是( )
—I see. I'll send the paper to you ________.
①蚯蚓走迷宫 ②蜘蛛结网 ③小猴做算术 ④蜻蜓点水
(2015•贺州)空气中体积分数约为78%的气体是( )
It takes me two hours ______ my homework every day.