—— Is Jack back?—— No, but I think he ______ in half an hour.
—Smoking _________in the cinema. Please stop _________. —Sorry, I won’t.
The skirt _________is made of silk is very expensive. I can’t afford it.
—Can you guess if they ________tomorrow? —They will come if they ________free, I think.
My grandparents _________for fifty years and they are both quite healthy now.
—Where is Jack? —I noticed that he ________the teacher’s office just now.