1 . We do eye exercises ________ a day to protect our eyes. (two) (所给词的适当形式填空)

2 . The volunteers ________ (定期) contact with the community to help old people deal with tough problems in life. (根据汉语提示单词拼写)

3 . Jordan says that the secret to his success is   ________________________. “...; every one fails at something. But I can’t accept not trying.” Losing games taught him to practise harder and ________________________.(根据句意填空)