While you are hurrying to the airport, _______in a heavy traffic jam in a taxi is quite an unpleasant experience.
32. ---What can I do for you ? ---_______you see Mr. Black, give him my regards.
31. To our surprise, they decided to________their differences and try to face the coming global problems together.
30.________some English-learning websites if you are free, and you will learn a lot about how to study English.
29. My father, who values honesty__________all things, never allows us to tell lies.
28. It is only when agriculture is fully developed___________industry can have abundant materials and markets.