1) You can't / mustn't / needn't smoke in the sports complex.  2) When I was younger, I might / could / must run very fast. 3) She can't / might / must be the team captain. She's the most experienced player. 4) You can / must / have to eat healthy food to stay fit. 5) We can / need / must to warm up properly before playing tennis. 6) The coach said we can't / couldn't / needn't use the gym equipment after 5 PM. 7) She can / may / must swim 2 kilometers without stopping. She's so strong! 8) We might / must / need go hiking this weekend if the weather is good. 9) You don't have to / can't / mustn't buy expensive sportswear for training. 10) Athletes can / might / must improve their performance with regular practice. 11) They have to / had to / must wake up early for training last year. 12) You could / have to / may check the weather forecast before planning an outdoor run. 13) Last year, I can / could / must not lift heavy weights because I had problems with my hand. 14) People who want to lose weight need / may / can to exercise regularly and keep healthy diet. 15) We needn't / mustn't / might not bring our own equipment; we have everything here.

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