Passive Voice in Publications.

Complete the sentences with the Passive form of the verb in parenthesis in the present and the PAST.

1. The distance to the moon _______ ___________ (calculate)

long ago when measurements ________ __________ (make) by

ancient astronomers.

Observations __________ _______________ (take) from two

different places on the ground. The moon and these two

locations.

On the Earth a triangle _________ ______________ (form).

This imaginary triangle ______ ___________ (use) by ancient

astronomers to calculate the real distance to the moon.


2. This method ________ ___________ (not use) anymore.

Today laser beams _______ ___________ (use) instead.

Now, laser beams from the Earth ________ __________ (reflect)

by the mirrors, and the moon’s position _______ __________

(measure) to the nearest centimeters.