I couldn't do my homework with all that noise
---- Do you mind my taking this seat? ---- ____.
It was not until 1920 ____ regular radio broadcast began.
It was about 600 years ago ____ the first clock with a face and an hour hand was made.
____ is a fact that English is being accepted as an international language.
If you go to Xi’an, you’ll find the palaces there more magnificent than commonly ____.