It is important to make as many enquiries as possible in the conversation and try to _____ the nationality and any accent of the informer.

单项选择题You will get a signature _____ delivery, and compensation of up to ￡28 for loss or damage.

单项选择题Complaints from the clients should be dealt with in a ______ manner in case they will go from bad to worse.

单项选择题You can send small packets by airmail or by surface mail. European destinations have a _____ time of 3 days for airmail and 2 weeks for surface mail.

单项选择题There isn’t enough space, I want you to clean _____ all the old files.

单项选择题What is the size of the new module