Fever is a _________ of many illnesses. So I suggest that you should take your son to see a doctor at once.
-Did you hear that Tonna took social management as her major? -Yes, but she shouldn't have, you see. This kind of subject __________ one's communication ability, and that's what she is most weak at.
-When on earth will the bus come? We have been waiting here for what seemed long ages. -Look,__________.
It's high time we __________ effective __________ to improve your working conditions.
The house rent is expensive. I've got about half the space I had at home and I'm paying __________ here.
John hadn't been able to stop smoking suddenly; he had to control his smoking desire __________.