Give her a ______. She is doing her homework.
A：test
B：break
C：rest
D：hand
— What did the teacher say just now?
— He asked them _______ the math problem.
《梦溪笔谈》中写道：“若止印三二张，未为简易；若印数十百千本，则极为神速。”文中所述是指( )
