Teachers should ___them to continue studying when some students want to give it up.

We can’t live _____ air or water.[ ]

This fashion show in our school was so ________ that we heard ________ shouts everywhere.

He refused to give up _____,_____we explained that it was bad for his health.[ ]

She asked if I ________ to Beijing tomorrow. If I ________, she will go with me.