The citizens of Beijing are proud of _______ they have done to make Beijing a beautiful city.
. The purpose of new technologies is to make life easier, ______ it more difficult.
All the preparations for the project ______, and we’re ready to start.
. All her time _______ experiments, she has no time for films.
. He knows nothing about it, so he can’t help _______ any of your work.
He ran as fast as he could _____ to catch the early bus.