Sports can not only ________ our bodies but also our confidence(自信). A. put up B. build up C. grow up
Sixteen-year-olds should _________their ears pierced.
His grandparents used to ________ a walk after dinner, but now they are used to ________ a walk after breakfast.
My sister was ________out at night.
______ is necessary _______ us ________learn English well.
You should read _______ the lights _______.