补全下列句子
由于大雪，高速公路已经被封闭。
The freeway__________________________ because of the heavy snow.
对不起，先生，这次展览的门票已经全部卖完了。
Sorry, sir, all the tickets for the exhibition___________________.
这座城市明年将建多少座大楼？
How many high buildings_______________________ in this city next year?
为了多种一些谷物，很多树被砍掉了。
Large numbers of trees_________________________ to grow more grain.
我喜欢这部科幻电影，它已经在电视上播了三次了。
I like this science fiction film and it_______________________________
_____________three times on TV.
至于英语演讲比赛，举办的时间和地点还没有确定。
As for the English Speaking Competition, when and where it_____________ __________________ hasn't been decided yet.