根据下列句子中所给汉语意思，写出空缺处各单词的正确形式。(每空限填一个词)

1. Can you ______ (拼写) your name, please?

2. Singing is a good way to make people ______ (害羞).

3. ______ (夏季) comes after spring.

4. Does it take you two ______ (小时) to do your homework every day?

5. Please remember to ______ off (关) the lights.

6. Hurry up, or you will be ______ (迟到) for class.

混凝土试件以机口随机取样为主，当一组试件中强度的最大值或最小值与中间值之差超过（）时，取中间值作为该组试件的强度代表值；当一组试件中强度的最大值和最小值与中间值之差均超过（）时，该组试件的强度不应作为评定的依据。

A.5%

B.10%

C.15%

D.20%