However, at times this balance in nature is ________ resulting in a number of possibly unforeseen effects.A. troubled B. bothered C mixed D. disturbed
------______, is the seat free? ------______, it’s taken. My friend will be back soon.
—Everyone has periods in their lives_________everything seems very hard.
—Is he coming? —I'm not sure.He may be late or,____, he may not come at all.
—Did you enjoy the book? —Yes, it was so interesting that I could hardly_________it.
Listen to the two girls by the window.What language_________?