The children took a trip the Great Wall last week. [ ]

_______ the smoke come out of the building, my first thought was to call the fire department as soon as possible.

The paper says Iron Man 3 is on this evening. Let’s go and see it. — But I ________it.

_______haveyoulearnedtoplaytheguitar?—Forthreeyears.[ ]

Where ______ the post office?