A、He is too young to catch up with others. B、He is not intelligent enough. C、He pays too little attention to his study. D、He can

W: How have your two sons been doing at school lately, Andy?
M: Terrible! James never starts working, and Malcolm never stops working.
W: I hear that Malcolm is likely to win all the prizes in the exams this year.
M: Yes, so his teachers say. But he deserves to do well. He’s always been so conscientious and, he’s been slaving at his books every evening for months on end recently. He wants to go to Oxford University next year.
W: Maybe he’ll become a university lecturer himself eventually.
M: Maybe. But I think he studies too hard; I sometimes wish he’d go out and enjoy himself for a change.
W: Yes… What about the younger one?
M: Well, James’ teachers say that he has ability, but that he’s too inconsistent and that he rarely does his best. In other words, he’s not bad when he makes an effort, but he’s too idle. He couldn’t care less about exams. He does his homework in ten minutes every evening and then rushes out to play tennis.
W: He’s crazy about tennis, isn’t he? Perhaps he can make his fortune at it. You can make more money from sport than from an old-fashioned profession these days.
M: So I believe. But my wife always worries about the children’s future. She wants James to give up tennis and study law, but I don’t believe in forcing boys to take up careers they’re not cut out for. I wonder how James will develop in a couple of years’ time!
Questions 19 to 21 are based on the conversation you have just heard.
19. Why does Malcolm study so hard?
20. What is James’ problem in his study?
21. What is the man’s attitude towards James’ future?