请在每题B句中每一空格内填写一个词,使A,B两句意思相同。 1. A: He is old enough to join the army. B: He is _____ old _____ he can join the army. 2. A: He is too young to go to school. B: He is _____ old _____ _____ go to school. 3. A: The problem is so difficult that I can"t work it out. B: The problem isn"t _____ _____ _____ _____ to work out. 4. A: The bag is too heavy for her to carry. B: The bag is _____ heavy _____ _____ can"t carry _____. 5. A: This pair of shoes is so dirty that nobody will wear it. B: This pair of shoes is too dirty _____ _____ to wear. 6. A: He isn"t tall enough to join the team. B: He is _____ _____ _____ join the team. 7. A: I am very glad to do it for you. B: I am _____ _____ glad to do it for you. 8. A: She hasn"t enough time to do the work. B: She has _____ _____ time to do the work.