沥青成分分析:studying at school___up her much time

studying at school___up her much time 请问：to meet the new demands being placed upon us studying at higher level怎么解释 Which American university are you studying at? 中的are 是否可以改成do at改成in 为什么 studying是什么意思 How do studying English? studying如何发音 at at at what is your opinion on studying abord 题目为studying abroad的课文 which standard are u studying?什么意思