问答题他想起了母亲，才鼓足了勇气继续干下去。(the thought of)

【正确答案】Only the thought of his mother gave him the strength to go on doing it．

【答案解析】(可以将“想起了母亲”这一动宾结构翻译为名词结构的the thought of his mother，这样使句式更加紧凑。)