来源：学生作业帮 编辑：作业帮 时间：2019/03/20 17:55:49
1________i have learned something about the traditions and custons of the country,there are a lot of things i don`t know.
A.before B.since C.while D.unless
2 the boy found it hard to ______ his granny how a computer worked and what it could do.
A.explain B.express C.explain to D.express to
1.C.while表示两者之间的对比,翻译为尽管.2.C.用的是explain sth to sb的句型