Similarly, according to B and C, the answers to questions 2, 3, 5 and 7 are ×, √, √ and √ respectively;
According to A and C, there are also four questions with the same answers. The answers to questions 3, 6, 8 and 9 are √, √, ×, √ respectively;
To sum up, the answers to the question 1 ~ 10 are × ,×, √, √, √, ×, ×.
According to D's answer, D's answers to questions 2, 3, 6, 9 and 10 * * are wrong, and 50 points are scored.
So the answer is: 50.