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pen and her coat, leaving home with a found it difficult to her father39。s the use ________a greenhouse? A greenhouse is made ________glass and is used ________growing plants. 答案: of; of; for 6. The rice straw tied ________the trees helps them to grow ________ the cold period. 答案: around; throughout 7. That probably does not seem much to you ________me, ________it is a rapid increase ________pared to