---- Do you mind if I smoke? ----________.
34.It took the early settlers more than 150 years to build up ___________is now a modern city.
33.Only after he had spent several nights working on the math problem_______to wonder whether the problem was wrongly set.
32.—Why are you so sweaty? --- I__________football with my classmates and how I want to have a drink!
31.______weather it is, we shall set out at 8o'clock.
30.Some children want to challenge themselves by learning a language different from____spoken by their parents at home.