2Complete with one formal preposition meaning *about*.
4Complete with one verb in a polite indirect question.
6Complete with one adjective in a polite request formula.
8Complete with one verb in a standard closing line.
10Write the first two lines of a reply to an email from a customer whose order arrived incomplete.
One good answer
Dear Ms Chen, Thank you for letting us know that only part of your order arrived. I am sorry for the inconvenience, and I have checked what happened with our warehouse.