单选题 To keep health, we have to keep () hours.

单选题 Ecological vehicles are made of materials that can be easily ( )once they are dumped.

单选题 Christmas is not just a()holiday now. People other than Christians also celebrate it.

单选题 The relations between my mother and brother were getting worse as my brother grew older and more( )

单选题 He is an incurable idealist; it's unlike to help him come down to earth and be more ( )

单选题 Tom goes to that pub every night to have a bottle of beer. He is a()customer.

单选题 Friends might not be always trust-worthy, but dogs are; they have long been regarded as the most( )company of human beings.

单选题 There has been a lot of( ) prejudice in American .