If someone mentions an unfamiliar acronym in your presence, you should

ask the person to … and explain it.

Every computer on the network needs a … so messages know where to go

after they are sent.

A diesel engine differs ....... 

a petrol engine

in many important respects.

I strongly object..... the tone of the last paragraph of your letter.

Some business people find it hard

to choose ........

Harry pleaded ...... the judge not to send him back to prison.

I haven't really read the report

properly. I just glanced ......

Sarah was involved ....... a traffic accident on her way to work

The head teacher accused

George .....

I insisted ...... 

seeing the doctor at once, even though I did not

have an appointment.