You used to be short, didn’t you– _______. I was the shortest in my class.

Don‘t you think ____ necessary for friends to trust each other

Look out! You ______ now. Please don’t talk on the phone.

Mrs. Smith often goes to visit those AIDS patients in hospitals to cheer up.

(2013·高考新课标全国卷Ⅱ)Only by increasing the number of doctors by 50 percent ________ properly in this hospital.