Why are you so ........ of his work? He's just doing his best.

A. critic B. critical C. criticize D. criticism

Life always needs a lot of ......

A. innovate B. innovator C. innovation D. B&C

They are working ....., so we are .....

A. effective, satisfactory B. effectively, satisfactory

C. effectively, satisfied D. effective, satisfied

The .... of the model attracts us.

A. efficiency B. effect C. efficient D. effectively

Water .... is increasing this summer.

A. consume B. consumer C. consumption D. consuming

Watching Korean films on TV is a time - .... activity.

A. consume B. consumer C. consumption D. consuming

The .... are requiring us to repair the machines.

A. consume B. consumer C. consumption D. consumers

This energy - .... bulb is not cheap.

A. save B. saved C. saving D. savoury

The ....... of this machine requires the latest techniques.

A. production B. productivity C. products D. produce

This plant’s .... is high, so it attracts a lot of investment.

A. production B. productivity C. products D. produce