依次填入下面一段文字横线处的语句，衔接最恰当的一组是( )从保障粮食安全的途径看， 。 。 。 ____________。 ____________。____________，把中央精神、中央部署贯彻全面，执行有力。①守住谷物基本自给、口粮绝对安全这个“底线”，绝不能以为可以放松粮食生产了②我们要像保护文物、保护大熊猫那样，保护好耕地这个粮食生产的命根子③明白了这些道理，我们才能准确理解国家粮食安全战略④关键是守住“红线”、保住“底线”⑤严防死守耕地“红线”，不仅是数量上的，而且是质量上的⑥可以适当增加进口和加快农业“走出去”步伐，绝不能误读为可以放松国内粮食生产

ot stay here a little longer— _____, but I really have to go.

The opponents(对手) were________ the ball for most of the match, and at last they won the game.

Because he was _____ the new limit, he was stopped by traffic police and was fined 200 yuan.

It was in the lab_________was taken charge of by Johnson_________they did the experiment.