Whenever you have questions in class, first you should _____ your hand , then _____and ask with the permission of the teacher.
If you already have health insurance,the only change ________ you'll see under my plan is lower premiums.
Paul attends very ________ meetings,and when he does,he has very ________ to say.
It is believed that health problems are closely connected with bad eating habits and a _______ of exercise.
-Is John coming by train? -He __________, but he can’t. All the trains have been cancelled because of the snow.
You've missed your ____, and you will have to wait for the next round.