_____ to sunlight for too much time will do harm to one's skin.Exposed Having exposed Being exposed After being exposedWith the rapid development of this mountainous area,the number of the visitors is expected to double ____of the present within 3 ye

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_____ to sunlight for too much time will do harm to one's skin.Exposed Having exposed Being exposed After being exposedWith the rapid development of this mountainous area,the number of the visitors is expected to double ____of the present within 3 ye

_____ to sunlight for too much time will do harm to one's skin.Exposed Having exposed Being exposed After being exposedWith the rapid development of this mountainous area,the number of the visitors is expected to double ____of the present within 3 ye
_____ to sunlight for too much time will do harm to one's skin.
Exposed
Having exposed
Being exposed
After being exposed
With the rapid development of this mountainous area,the number of the visitors is expected to double ____of the present within 3 years.
what
it
one
that
第二题答案是A

_____ to sunlight for too much time will do harm to one's skin.Exposed Having exposed Being exposed After being exposedWith the rapid development of this mountainous area,the number of the visitors is expected to double ____of the present within 3 ye
1.Being exposed -动名词作主句
2.that ,指代number .不用it 是因为前面还未提及过.
---也许那个数和这个数不是同一个数了,所以不能指代了.如果用 what 就是省略的宾语从 句

1。being exposed.现在分词的被动式作主语。
2. that.

Being exposed
that

Being exposed 长时间被阳光照对皮肤有害。
that 指游客的数量,在3年内可望达到现在的翻倍数量