However, at times this balance in nature is disturbed, a number of possibly unforeseen effects.
You can only be sure of_____you have at present;you cannot be sure of something_____you might get in the future.()
The practice of hanging clothes across the street is a common_____in many parts of the city.
-Bill,if it doesn't rain,we can go straight on and spend more time in Vienna. -I just want to hear Mozart.
-Robert is indeed a wise man. -Oh,yes.How often I have regrettedhis advice!
The school’s music group will be giving a big show tomorrow night and two_____on the weekend.