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课时作业(九) [必修2 Unit 4 Wildlife protection] [限时：35分钟] Ⅰ.单项填空 1．When you get your paper back, pay special attention to ________ have been marked. A．where B．which C．what D．that 2．As a writer, I like ________ when people send me pictures of their lovely children reading my books. A．this B．that C．one D．it 3．—Have you got your exam papers? —Not yet. I guess they ________ at this moment. A．are being graded B．are grading C．have graded D．have been graded 4．News that the president's life was________could cause the nation's economic crisis to become worse. A．in order B．in danger C．in place D．in ruins 5．He kept a little notebook, in which________ the names and addresses of his friends. A．wrote B．was writing C．was written D．were written 6．The survivors of the crashed plane had no food or water and were ________ the extreme cold weather. | 
