then,climbed,they,home,mountain,came,the,and(.)连成一句话

then,climbed,they,home,mountain,came,the,and(.)连成一句话 hill,they,climbed,the,up (.) hill,they,climbed,the,up（．） F____ they climbed up the top of the mountain. hill,they,climbed,the,up.连词成句, then we climbed the ____(at up in)mountain选什么?为什么then we climbed ____(at up in)the mountain They were young,then. they were young ,then . then what did they By the time i——back they——up ten metres.A came.have climbed B came.had climbedC come.have climbed D had come.climbed They had a short meeting and began to ( )it when they climbed up the mountains. They then invented the zero. by the time I came back they had climbed up..by the time I came back they had climbed up ten metres现在完成时的结构不是has/have加动词过去分词么?为什么不用have climbed? 帮我看看这段英语有问题吗?We saw the sea.The sea was really magnificent.In the morning We played at the seaside.In the afternoon we collected shells.They were beautiful,we like there very much.Then I climbed the mountain.We got home at twe as they climbed higher,the air became cooler.怎么翻译?as 的词性是什么,急用, run into the air还是climb into the air?具体语境：Then the plane __________(ran/climbed) into the air. They began to climbed the mountain after they had bought all the food and drink.改为否定句 climbed是什么意思?