假如你是李华，昨天学校为你么举办了18岁成人宣誓仪式。请根据下列要点给你在美国的笔友发一封电子邮件，描述宣誓仪式过程并简述拟的感受。
要点：1.宣誓仪式；2. 感谢家长和老师的培养、教育；3. 老师送贺卡；4. 表演节目。
注意：1. 邮件必须包括以上要点，可适当发挥；
2. 词数120左右；3. 开头已为你写好。
参考词汇：宣誓 make an oath
Tom,
It is great to receive your email.
Don’ t be joking. It’ s time to______your business.
A. set out B. take up C. go on D. get down
Jim went to answer the phone. _____, Harry started to prepare lunch.
A．However B．Nevertheless C．Besides D．Meanwhile
When ______questions in class，one should answer them as clearly as possible．
A．asking B．to ask C．to be asked D．asked
After the bell rings，which indicates the ending of the exam，you_____stay where you are until all your papers are collected．
A．shall B．would C．will D．can
—You were not listening；what troubled you?
—I my coming math exam．
A．am thinking about B．was thinking about C.had thought about D.will think about
