難度:★    考點:介詞的使用
	
	  1. Bill has made great progress _____________the help of his teachers.
	
	  A. for           B. with         C. under
	
	  2. Her mother goes to work ______    bus every morning.
	
	  A. by             B. at                         C. on                  D. in
	
	  3. Linda is not good at Chinese, but she passed the exam ______ the help of her classmates.
	
	  A. with              B. under              C. without
        
