A law passed in 1933makingita crime punishable by imprisonment for a United States citizen to hold gold in the form of bullion or coins,(thata United States citizen hold gold in the form of bullion orcoins)
句中的it 為形式賓語,真正的賓語是帶有邏輯主語的不定式 for a United States citizen to hold gold in the form of bullion or coins,該不定式完全可以換成 that 從句。正如你所說的換成 that a United States citizen holds gold in the form of bullion orcoins。