.After trying hard, they _______ the hope of finding an effective way to solve the problem.
Haveyouheard____news?Thepieceof____petrolisgoingupagain!
If a person has not had enough sleep, his actions will give him ___ during the day.
We finished the run in less than half the time ____.
--- Shall we go out for a walk? --- Sorry. This is not the right ____ to invite me. I am too tired to walk.
What a pity! Considering his ability and experience, he ____ better.