1.3D films (exist) since 1922, when The Power of Love was first shown.
2. Smoking (not allow) on any planes in the EU.
3.The world’s first manned hot-air balloon (make) by the Montgolfier brothers in 1783.
4.Look out of the window! I think our house (watch)!
5.By the time Sandra got to the party, all the food (eat).
6.More than three million tourists (visit) the Taj Mahal in 2004.