Ⅰ.单句语法填空
1．Sadly，the boss didn't know that one of his partners (partner) was trying to cheat him out of his money.
2．It was thundering(thunder) loudly；meantime，it was raining heavily.
3．While walking your dog，you shouldn't loosen (loose) it to avoid any accident happening.
4．While visiting Mount Tai the other day，we met with several Germans (German)．
5．He was old enough to have the power to judge (judge)．
