You ___ be more polite with

clients.

___ you explain this again? I didn't hear you. 

I ___ join the meeting, but I

am sick.

You ___ double-check the data before sending the report to the manager.

___ you send the invoice

today?

We have received a report, the sales are too low. We _______  increase them next month.

Jack didn't understand the theme. He ___ like to ask a question.

You ___ use your phone during meetings.

Staff ___ wear formal clothes

in the office.

___ you open the window,

please?