老师好，麻烦您帮我解答一个问题。谢谢“what is crucial to a successful classroom is to involve students.”the professor
said.（be crucial to）“一个成功课堂的关键是让学生参与进来。”那位教授说1．划线部分为什么使用what做主语2．what is crucia...
...ious real-time strategy games in the series, Ghost was to be a stealth-action game.与系列中的前作均为实时策略游戏不同，Ghost是一款动作潜入类型的游戏，请教这里的"was to be"是什么语法点呢，直接说was不就行了吗？
老师：您好！请问这句话，我这个翻译对不对？National holiday created to announce future space explorations as well as honor China's pioneers of space travel.这个国家节日用以宣扬和表彰中国太空旅行的先锋以及未来太空的探索者们。
America’s S&P 500 stockmarket index ended the first quarter slightly higher than it was at the turn of the year—an outcome that seemed unlikely after a turbulent start to 2016. 请问：(1) at the turn of 是什么意思？(2) start to 2016 是什么意思？
...r thing in a group is the number of people or things of that kind compared to the total number of people or things in the group.compared to the total number of people or things in the group.是定语短语修饰 the number of people or things of that kind吗？
The eldest son of parents who were themselves poor, I had, fortunately, to begin to perform some useful work in the world while still very young in order to earn an living and therefore came to understand even in early boyhood that my duty was to assist my parents and become, as soon as possible, a ...