___ comes to saving energy, bigchanges start with small steps, like turning off the lights.

It’s a pity that Jerry didn’t go to yesterday’s meeting.—Yes， he missed a good ______of being the chairperson of the Students’ Union.

Where is your uncle—He _____ to South Africa on business. He has ______there twice.

s one fourth and a half, do youknow— Yes, it’s _________

Mary doesn’t hear very well.—-Yes, there iswithher ears.