If it _______not raining, I could go out.

______ the experiment he left the laboratory.

Antikythera is a Greek machine, thought to have been made around 100 BC, designed for _______ astronomical positions.

He went away without _______ us the necessary information.

______ computers are computers with combined features of both digital and analog type.

From the station they _______ straight to the hotel.

At 10 o'clock tomorrow they ______ homework.

We would not have got wet if you _______ an umbrella.

The speed at which instructions are executed is expressed as the number of _______.

The intention of the author is _______ some newly developed methods.