I try keeping the meeting short, ______ to waste everyone's time.
The man moved forward and looked over the edge (边缘), shrinking his shoulders.
When life lets you down and when it seems that your world is ______, take courage and go the next step.
As is known to all language learners, the newly learnt words will soon be forgotten unless ______ used in everyday communication.
Since you have missed such a good chance, don’t think about it any more. It’s ______ crying over spilt milk.
The proverb “Seeing a thing for oneself is better than hearing about it” means that secondhand experience is less ______ than firsthand experience, which is perfectly true.