to be nearby=一個英語單詞 to make sure of sth=一個單詞 good; not expir

題目：

to be nearby=一個英語單詞 to make sure of sth=一個單詞 good; not expired=一個單詞
to add electricity to a battery or money to a phone card=一個單詞

解答：

to be nearby = close
to make sure of sth = confirm
good; not expired = valid
to add electricity or money = recharge