两个英语合并句子题~十万火急!Join the two sentences,you nedd to add commas

1.The operation was performed in a famous hospital.My grandfather's hearing improved.
〓> My grandfather's operation was performed in a famous hospital and his hearing improved.
2.When I went on a tour round China,I saw many historical sites.It was very exciting.
〓> I saw many historical sites when I went on a tour round China which was very exciting.

When I went on a tour round China, I saw many historical sites. It was very exciting,The operation was performed in a famous hospital. My grandfather's hearing improved.
应该是

1.Because of the operation performed in a famous hospital, my grandfather's hearing improved.
2.When I went on a tour around China, I saw many historical sites, which was very exciting.

合并句子要巧用连词。
1.After the operation was performed in a famous hospital, my grandfather's hearing improved.
2.When I went on a tour round China, I saw many historical sites, which was very exciting.

While I was on a tour round China to see many historical sites excitedly, the operation of my grandfather which improved his hearing was performed in a famous hospital.

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