1、A这个不是强调句型 (as引导定语从句)
2、B可能性(AC是将来时态)
3、A cannot but +动词原形 不得不=have to
4、D 原句可改为:I think taking more exercise can ensure your son's health.
有疑问再追问,
1、A这个不是强调句型 (as引导定语从句)
2、B可能性(AC是将来时态)
3、A cannot but +动词原形 不得不=have to
4、D 原句可改为:I think taking more exercise can ensure your son's health.
有疑问再追问,