题目内容
楔状缺损最常见于牙齿的哪个部位
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导致牙齿松动与脱落最主要的疾病是
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Complete the sentences with suitable expressions from the collocation box.Make changes where necessary. Sometimes more than one collocation is possible.1. _____________ is the cleanest and most abundant renewable energy source in the world.2. With the help of technicians,_____________can be installed without damaging the roofs.3. A(n)____________ is a group of consumers that show some level of interest in a market offer.4. The bicycle shop has ______________ by combining mail order and retail sales.5. ______________ abroad is more difficult than developing new businesses.
Complete the sentences with suitable adverbs or prepositions to collocate with the italicized words.1. When shopping online, you may post a review in exchange _____ a free or discounted product.2. I look forward to seeing you next month at the seminar and ____ the meantime, should you have any queries, please do not hesitate to contact me.3. Customers were amazed at the range of products _____ offer in the new supermarket.4. The businessman was deep _____ debt and could see no way out.5. Those companies that can provide goods or services _____ a low cost are likely to survive the financial crisis.
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