However, at times this balance in nature is ________ resulting in a number of possibly unforeseen effects.A. troubled B. bothered C mixed D. disturbed
Some scientists believe that is no doubt a cure for AIDS will be found.
About four meters long, the room a small reception hall.
–Alice, feed the bird today, _____? --But I fed it yesterday.
The government has promised to the matter and give the workers a satisfactory answer.
It me that he always finishes his work in a short time. He is well-known for his working at an speed.