1、He is a kind person and always ready to ——others help.
A、provide B、offer C、supply D、afford
2、Being a secretary for many years ,he has learned a ——to please his boss.
A、trick B、idea C、thought D、mean
3、His knowledge of history is rather ——（有限的）and he want to learn more.
改错：
4、It was a long time that I had ever seen such a heavy snowfall.