It was great joy 　　　　　　　he received the news that his long lost son would return home

It’s important ______ you ______ out for awalk after supper.

Jumping out of ______ airplane at ten thousand feet is quite ______ exciting experience.

I saw Tom in the meeting-room, so heattend the meeting.

To achieve a bright future, we should______ study hard____ keep in good health.—I agree with you.