18. A
句意:如果他们的市场计划能成功,他们将提高20%的销售量。if引导的条件状语从句中谓语动词为succeed,使用的是一般现在时表示将来,可知主句应为一般将来时。
19. C
句意:在过去的几十年里,由于全球变暖,北极的海洋冰川逐渐减小。时间状语是over the past decades“在过去的几十年里”,要用现在完成时,且表示海洋冰川在过去的几十年里一直在持续减少,故选C。
20. B
句意:“汽油的价格这几天怎么样?”“噢,自从上个月,它急剧上涨。”根据since last month可知应用现在完成时。arise意为“出现,产生”,不符合句意。
21. D
句意:这对老夫妻结婚50年了。marry“娶,嫁”,是短暂性动作。be married表示状态。
Tom grows the nicest vegetables and fruits and the most beautiful flowers in the village. Plants grow in Tom’s garden all through the __1__ and they are much __2__.
Tom cuts some flowers for his sitting room table, eats some fruits and vegetables, but he __3__ most of them in the market. His vegetables, fruit and flowers are so __4__ and beautiful that they sold much more __5__ in the market than those of other villagers.
How does Tom grow these beautiful things? He is so __6__ that he just sits under his orange tree with his radio.
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