"Cindy，how far is it from your home to school？""About 20 walk．"（ ）
| A． |
minutes |
B． |
minute's |
C． |
minutes' |
"Cindy，how far is it from your home to school？""About 20 walk．"（ ）
| A． |
minutes |
B． |
minute's |
C． |
minutes' |
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