单项选择题
A．lighter B．cleaner C．quieter D．smaller
A．Care for the Elderly B．The Best Community Services C．The High Cost of Nursing Homes D．How to Improve Parent-Child Relationships
A．tasks like soup-stirring are rather difficult for robots B．one million pounds is quite enough for the study C．robots should be tested first in the kitchen D．robots will soon be working in factories