The purpose of new technologies is to make life easier, ________ it more difficult.
China always plays ____ active part in fighting against _____natural disasters.
It’s ______ difficult to draw the boy’s attention to his lesson.
It was just a week ago________ an earthquake happened in Taiwan.
He is a well-known singer, but he is ______an actor.
The prize will go to the writer ________ story is most meaningful.