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1·John has been to the aquarium.

约翰曾经去过水族馆。

2·One of his latest projects has been to make plants grow in experiments using some common vegetables.

他最近的一个项目是把一些常见的蔬菜在运用到实验中，让植物生长。

3·The unintentional consequence has been to halt the natural eradication of underbrush, now the primary fuel for megafires.

意外\的后果是阻止了对灌木丛的天然清理，而它们现在成了超级大火的最主要的燃料。

4·Our policy has been to uphold the law.

我们的政策一直是维护法律。《柯林斯英汉双解大词典》

5·Everyone in my class except Tom and Mary has been to Beijing.

除了汤姆和玛丽，我们班的每个人都去过北京。

6·Neither Jim nor Tom has been to Australia before, but they know the country very well.

吉姆和汤姆以前都没去过澳大利亚，但他们对这个国家非常了解。

7·Laura has been to London at least twice so far.

劳拉到目前为止至少去过伦敦两次。

8·He has been to Canberra, the capital city of Australia.

他去过澳大利亚的首都——堪培拉。

9·Almost everyone in our group has been to the 2nd Digital China Summit.

我们组几乎每个人都参加过第二届神州数码高峰论坛。

10·The overall goal of her work has been to depict the world of the soul and the spirit, not to mirror concrete reality.

她作品的总体目标是描绘灵魂和精神的世界，而不是反映具体的现实。