Although Rose is very busy, she still ____ a lot of time to her students in her spare time.
I was really anxious about you. You _______ have left home without a word.
___ reading books in my spare time, I also surf on the internet sometimes.
Work means much to me. It is ______ of my life ______ air, water and sunlight.
To gain a bigger _______ internationally, many companies are striving to make their products more competitive.