People are concerned about the quality of the air they ______.

I’m not sure if it _________tomorrow。If it __________ ,we won’t climb the South Hill.

Only when I left my parents for Italy _how much I loved them.[ ]

I think our history teacher teaches us ______.— Yes, but he hasn’t come today. He doesn’t feel ______.

“I ___asleep all afternoon, so I didn’t hear the phone. “he ___to me.