早产儿，尤其是胎龄小于32周的早产儿留存胚胎生发基质，对缺氧十分敏感，易发生脑室周围和脑室内出血。()
参考答案：对
I'm thinking about ______ to the mountains for vacation. [ ]
A. go
B. went
C. going
D. to go
