单选题 One may have to read something a second time if ______.

A、 there is enough time
B、 one reads too fast
C、 the passage is very long
D、 one reads word by word

【正确答案】 D

【答案解析】[解析] “a very short jump is too short to provide any meaning or sense，and it will be found that having struggled with three or four words separately，the pupil has to look at them again”从这句话可以得知：如果一个字一个字地读，将不得不再回头看一遍。答案应该选D。