同义句转换(初三的,一句)The calculater was invented before the computer.转化为:The calculater was invented ______ ______ the computer.

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同义句转换(初三的,一句)The calculater was invented before the computer.转化为:The calculater was invented ______ ______ the computer.

同义句转换(初三的,一句)The calculater was invented before the computer.转化为:The calculater was invented ______ ______ the computer.
同义句转换(初三的,一句)
The calculater was invented before the computer.
转化为:
The calculater was invented ______ ______ the computer.

同义句转换(初三的,一句)The calculater was invented before the computer.转化为:The calculater was invented ______ ______ the computer.
应当用earlier than
个人认为ahead of是错误的

ahead of
ahead of与before意思相同,完全可以替换的.