问题补充：
If you work hard and never , you will learn maths well.
A. put up
B. pick up
C. give up
D. grow up
答案：
A. put up
B. pick up
(答案→)C. give up
D. grow up
解析：句意：如果你努力学习，从不放弃，你会学好数学的。put up举起，pick up采摘，give up放弃，grow up长大；work hard努力学习和neve give up从不放弃，是学好数学的条件，故选C.
