新概念77 A successful operation中的一个句子
新概念77 A successful operation中的一个句子
the operation,which lasted for over four hours ,proved to be very difficult because of the hard resin which covered the skin.
1、两个which 的关系?不可以用that?
2、proved to be是句型吗?proved to very……不可以吗?
2、because 接什么词和句子?
the operation,which lasted for over four hours ,proved to be very difficult because of the hard resin which covered the skin.
1、两个which 的关系?不可以用that?
2、proved to be是句型吗?proved to very……不可以吗?
2、because 接什么词和句子?
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你能帮帮他们吗