15. D。肯定判断用must，否定判断用can’t。
82
The Inspector of Schools
arrived yesterday morning, and he spent the whole day examining the classes.
The headmaster had told us a few days __1 that he was coming. I think the
headmaster was very 2 about it, for every day, he came to all
the classes, 3 the teachers over and over again what
they must do and examined the boys himself to see __4_ they were ready for the inspector. He
told us in our class that we were all fools and would be sure to make him lose
face before the inspector. All this made us very nervous; and when the 5 walked into our class we were all very
afraid. I felt that all I 6 knew had gone clean out of my 7 . The inspector is a tall man. He
wears glasses and always looks very strict. He 8 on examining the class in English, and I
was asked to read. I felt very nervous, but I got 9 without any bad mistakes. Some of the
other boys, 10 , did not do well and the inspector 11 serious, though he did not say 12 . We got along with history and
geography; but when it came to math, he set us some very 13 problems to solve which we failed to do;
so he looked very angrily at our teacher. Our teacher was very 14 with us later; but I am sure we should have
done better if we had not been so afraid. I think I should like to be 15 when I grow up, because everyone should
be afraid of me.