請幫我改這兩句英文(好簡單的)

第一句:

My --> 第一人稱, 所以 start 係唔駛加 "s"
so --> 雖然係一個連接詞, 但係 advance 既用法, 一般係開頭用既, 即係上一句當 simple sentence 咁完結佢~~
Must --> 有命令既意思, 需要/ 應該要, 都有好多唔同既詞用
until --> 直至, 係由開始直到尾咁解, 同你個意思應該完全相反

My Ref: My official hour start at 9am, I have to go to work at 8am, except the holiday.

第二句:
LCC --> 應該係 LCCI 呀, 而且LCCI 有好多科同唔同 Level, 最好講清楚 d
so --> 同上面同一個問題
think --> "想", 即係你覺得 only, 信心唔算強, 用 believe 會好 d
can --> 用 could 會比較有禮貌
control --> 工作一般都係用 manage 同 handle, control 係用係 operation 上面既

My Ref: I have completed the LCCI 3rd level Accounting course. I believed that I could handle this job.