The more satisfied your employees are, the more they will contribute ______ your company.
A. on
B. about
C. with
D. to
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John spent a lot of time ______ to his collegues how challenging the project was.
A. explain
B. explaining
C. to explain
D. explained
The company is looking for a well-organized and ______ secretary to assist the HR Manager.
A. experience
B. experienced
C. experiencing
D. has experience
The most important form of energy is electric energy, which is ______ used in our daily life.
A. wide
B. widen
C. widely
D. unwide
In the smart cities, communication will be ______ than it is today via digital technology.
A. fast
B. faster
C. fastest
D. fasten