The secret___ before an important exam is to tell yourself that it's not a big deal even if you fai
问题描述：
The secret___ before an important exam is to tell yourself that it's not a big deal even if you fai
C.calming down D.to calming down
这两项有什么区别,the +noun +to v-ing的原因是什么
答
这里的to是介词,calming down是名词.to 接在secret后面表示.的秘密,.的诀窍.和key to answer的用法是相同的