---There is some doubt _____ the concert will be held as the company intends to redecorate the stadium next week. ---What a pity!
11. How time flies! You should make _____ use of your time.
28. The stream in front of our village will dry_____ when early autumn comes around.
27. _____ the teacher came in, everyone was quiet.
26. She is very diligent. She often studies _____ into the night.
25. The article is too long, please cut _____ some unimportant details.