Only by practising a few hours every day _______ be able to master the language.
Although some unexpected difficulties have _________ in the process, we are confident that we can handle them.
—Some people believe that robots will take over the world one day. —What if that is the _________?
The Sydney Opera House, which _________ almost 900 rooms and halls of different sizes, is definitely at the top of our list when we travel to Australia.
In a foreign company, if you have a good command of English, you _________ much more easily.
During the reconstruction of the city, many modern tall buildings went up _________ old shabby houses were torn down.