问题补充:
单选题_____isbelievedthatthebetterknowncompaniesspendabout70percentofthetotalcostoftheproductitselfonpackaging!A.ThisB.OneC.ThatD.It
答案:
D解析此题考查代词。it 是形式主语,that引导的从句是真正的主语。It is believed that...“人们相信……”。
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