you go there with your parents—____, I will stay at home and prepare for my languagetests.

The environment is becoming worse and worse. I think we should do something to ____ people ____ cutting the trees in order to protect the earth.

use water to put out the fire if oil catches fire As is known, oil ________ float on water

You must attend the meeting ____ at ten o’clock, as it is scheduled—not a minute early or late

Why are you cutting ________ the grass? To feed it to your chickens?