题目内容：

语法填空

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

I enjoy 1._ (climb) mountains whenever I can find the time to do so．Tom and Mike are my best friends，both of 2. ___ also like sports．Two years ago，the three of us __3.(go) up to Mt．Lushan. Instead of taking a bus，which is 4. ___ (comfortable)，we preferred to climb．We started from the foot of the mountain early in the morning，5. ____ (chat) all the way．After about one and a half __6.__ (hour) climbing，we saw two mountain paths before us．We could not decide ___7.___to choose．In the end，we took the right path，thinking that might be a short cut．But we were wrong．We could not find our way out， _8.___(lose) in the mountain．We had to use our hands and feet to make a way．We began to cry for help __9.__nobody answered．It was not until darkness __10.__ (fall) that we found a right path leading up to a paved road．