- We'll begin (to???) work on next week.
- I think it's possible for the shipment to arrive by (三月十五日或之前how to say???).
- They are supposed to arrive (in/at???) Hong Kong (on/by???) 7th December.
- We are sorry for the loss you have suffered, and we (have agreed/agree???) to compensate you.
更新1:
還有: - We are very sorry for the trouble caused by the shipment delay of your order no. C3462, and we'll make (any/every???) effort to avoid repeating such irregular errors. - The goods (for/of/with/in???) your order no. 12345 have now been shipped by the Son of Apollo.