The nurses are trying their best to reduce the patient's fear ____ he would die of the disease. 17 、 We should consider the students’ request ____the school library provide more books on popular science. 18 、 Nobody believed his reason for being absent from the class ___ he had to meet his uncle at the airport. 19 、 Now there is a danger ____ the ground may fall in ( 沉下 ) under the heavy traffic. 20 、 Information has been put forward ____ more middle school graduates will be admitted into universities.