Only when your identity has been checked ______.

There’s a hole（洞）______ the wall and a picture ______ the wall.

afety issues, ____ willseriously affect the growth of teenagers and even the nation’s future

Facebook is a place where you can share _________is going on in your life with friends.

Father advised me not to say anything until＿＿＿＿＿ at the meeting.