A . to
B . for
C . on
D . in
[单选题]Singing Alarms Could Save the Blind.If you cannot see,you may not be able t
[单选题]Singing Alarms Could Save the Blind.If you cannot see,you may not be able t
[单选题]Singing Alarms Could Save the Blind.If you cannot see,you may not be able t
[单选题]Singing Alarms Could Save the Blind.If you cannot see,you may not be able t
[单选题]Singing Alarms Could Save the Blind.If you cannot see,you may not be able t
[单选题]Singing Alarms Could Save the Blind.If you cannot see,you may not be able t
[单选题]Singing Alarms Could Save the Blind.If you cannot see,you may not be able t
[单选题]Singing Alarms Could Save the Blind.If you cannot see,you may not be able t
[单选题]Singing Alarms Could Save the Blind.If you cannot see,you may not be able t
[单选题]Singing Alarms Could Save the Blind.If you cannot see,you may not be able t