不可以去掉喔
one是指代前面的forgery.
如有不懂可以继续追问喔.it 是形式主语真正的主语是that 后边的句子是吗it构成的主语从句由连词that引导的主语从句，在大多数情况下会放到句子的后面，而用代词it作形式主语常见用it作形式主语的复合句结构：It seems （happened / appears / doesn't matter / makes no difference / …）that …It is reported （well-known / hoped / thought / expected /said /believed/decided /suggested /ordered…）that…It is necessary （clear / true / strange/ important /wonderful / possible / likely…）that…It is a fact （a good idea / a pity / a shame / no wonder / good news…）that…