70. He _____ a very experienced teacher. He _____ French for 15 years.
Therefore, the correct answer is C) is / has been teaching.
71. I'm _____ to tell you the story I _____ at school today.
Therefore, the correct answer is B) going / heard.
72. Jimmy, Jane and Billy wanted _____ their grandfather who _____ to visit them.
Therefore, the correct answer is A) to impress / had come.