1、D
Tom's father__D has been a teacher__since 1998
since 用于完成时态时，谓语动词得是可持续的，只有been可以
A应为 has been in Shanghai B应为B has been teaching C应为：C has been in 。。。
2、A
I hope computers can make oue lives__A better and better__
首先排除B。又make sth +形容词，故C也错，D是修饰生命物体的，不能修饰lives（生活）
一D，二C
D A
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