“I heard they went skiing in the mountains last winter.” “It _________ true because there was little snow there.”

 _____________half an hour earlier, you would have met the famous writer.

--I once got lost during my first visit to Beijing. -- Oh, did you? You ____ me as your guide. 

Sir, you ______ be sitting in this waiting room. It is for women and children only.

Tony ____ the invitation, otherwise he would have attended your birthday party.