It’s necessary for the phubbers(低头族)to______the time they spend on their smart phones.

I rang the doorbell several times but I couldn’t make anyone .

Life is like a play; it’s not the length, but the excellence of acting ________ matters.

Instead of making many excuses you can’t reach your goal,just hold to your dream and never give up.

Jim came back early last nightIt was not yet eight o’clock ________ he got home.