初中英语完形填空:初中英语完形填空自测练习题(23)
Ballpoint pens have made life easier for millions of people. At one time 1 did not like their students to 2 with pen. Perhaps it was because pens can leak(漏) and it is 3 to spill(溢出) the ink. And it is hard to write on thin or cheap paper with them....