完成句子：
小题1:我们一直在挖掘一层层的积灰，几乎有六米厚，这意味着他们可能整个冬天都在烧火。
We have been excavating layers of ash almost six metres thick, which suggests that they ①_____ _____ _____ the fire burning all winter.
小题2:看样子他们用磨尖的石器来切割野兽并剥皮。
It seems that they used the ②_____ ______ _______ to cut up animals and remove the skin.
小题3:十几岁的时候， 他就开始探求人生的深层意义。
As a teenager, he ③______ _______ ______ a deeper meaning in life.
小题4:每次试图破纪录的时候，Ashrita 都会达到一个体力不可逾越的极限点。
Every time Ashrita tries to break a record, he ④______ _____ ______ ______ he feels he cannot physically do any more.
小题5:她看到母亲和大一些的孩子在烧烤鹿肉和猪肉。
She could see her mother and the older children preparing the deer and pig meat ⑤_______ _______ _________.