.I’ll never forget the mountain_______I climbed with my dad last year.

Two bottles of apple juice, please. — Only one bottle is left. Would you like to have ___________, sir?

.The building burnt down in a big fire. _________was the base on which it stood.

I called you yesterday evening, but there was no answer.—Oh, I am sorry I _____dinner at my friend’s house.

After reading for an hour, you’d better_______ the green trees for a minute or two.