Fill in the blanks with: can, could, will be able to, was able to, according to the tense required by the sentence context:
1. John ......... play football tomorrow. 2. Yesterday she ............ sing, although she had a bad cough before. 3. He told me that he ........... learn then poem easily. 4. She .......... carry her heavy trunk so far. 5. I think we must try and then we ......... ski in spite of the icy track. 6. When ........... you ............ swim faster? 7. I'm sure he .......... translate very well from English into Romanian. 8. The police ......... catch the burglar. 9. She ......... come yesterday because the road was slippery.10. I hope that with his help I ......... mend my car. 11. When you finish this exercise you .......... go home. 12. ............ they play volleyball on that rainy day? 13.When .......... he .............. speak English fluently? 14. He told me that he ............. play golf daily. 15. I ........... count on you whenever I needed you. 16. I ........... cross the road because the traffic was too heavy.