There is a tight connection between theory and practice that all theories ________ from practice and in return serve practice.
A. original
B. originality
C. origin
D. originate
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________ research has been done into this difficult and complicated case, so we believe someday we can solve it.
A. Extensive
B. Extinctive
C. Executive
D. Exclusive
There aretoo many ________ of management in this company, which will decrease efficiency and lead to confused management.
A. layers
B. liars
C. lays
D. lies
The government has already proposed and introduced a package of plan to ________ negative impact of financial crisis.
A. manage
B. tackle
C. cope
D. deal
Nowadays, a wholefood diet free from ________ additives, colors and flavors is increasingly popular among people.
A. architectural
B. automatic
C. artificial
D. arguable