I searched for my wallet and it wasn't there. At first, I thought I _______ it at home. Then I remembered _______ it out to pay for the taxi.
I ___ I could fly to the moon by spaceship one day.
I don't know when he ___. But when he ___ back, I’ll let you know.
Mr. King, manager of a big department store, is about to pay a visit ___ Chian next month.
Could you ___the radio a little? It’s too noisy.
Once ___, it can never be forgotten.