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第1题:用一个办法就可以将BC都排除,originally:原先,所以必须接一般过去时,BC都不符合时态要求. 见originally用一般过去时在OG中就有证明,有一句话是: Originally developed for detecting air pollutants, a technique called proton-induced X-ray emission, which can quickly analyze the chemical elements in 'almost any substance without destroying it, is finding uses in medicine, archaeology, and criminology. 第2题:固定搭配:decide to do,所以原句错。这里himself可以单独用。 |
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