The problems at the meeting tomorrow are really hard to solve.
you may have , you should gather your courage to face the challenge .
He was seriously injured.He lay on the ground, _______ to stand up.
---Thanks for your help, but can you do me one more favor, please?---____ , sir. What’s it then?
He is a man of few words, and seldom speaks until _______ to.
-- May I smoke here?-- If you____, that's the smoking section over there.