1complete the sentences with the correct active or passive form of the verbs in brackets. 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 (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. 7 do you think hotels (build) in space in the future? 8 twelve people (walk) on the moon since the first apollo landing in 1969. 9 the traffic is really bad this week because a tennis tournament (hold) in our town. 10 the shopping centre (not close) until midnight on thursdays.
