—When did you get to know the professor over there? —It was at the work shop we did reserch to gether two years ago.
—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.
If I were rich, I should help them out. _________,I can do nothing.