Everybody wants to go to Mount Huang, _____Lisa, who has gone there before.[ ]

He seems to be a good teacher . – _____ . He has been a teacher for

I called you at 4:00 yesterday afternoon, but no one answered.—Sorry, I ______ with my friends at that time.

Please come to my party if you ____ free tomorrow.

The apples _________sweet. Would you like another one?—No, thanks.