Examine the following sentence and choose the appropriate describtion.
This material has been tested by our engineers, and they like it.
a. Both clauses are in active voice.
b. Both clauses are in passive voice.
c. The first clause is active; the second clause is passive.
d. The first clause is passive; the second clause is active.

Hi fully:

The following page explains the difference between active and passive
voices very well:

Active and Passive Voice
URL: http://owl.english.purdue.edu/handouts/grammar/g_actpass.html
Quote: "In sentences written in active voice, the subject performs the
action expressed in the verb; the subject acts....In sentences written
in passive voice, the subject receives the action expressed in the
verb; the subject is acted upon. The agent performing the action may
appear in a 'by the . . .' phrase or may be omitted."

So, that means that the first clause is passive (note the "by") and
the second phrase is active.

The answer is d.

Search Strategy (on Google):
* grammar "active voice" "passive voice"

websearcher

Thank you,

Not sure about the answer but I do know you've spelt Grammar worng!

I would have to agree with the answer, D. Usually, you can tell when
the voice is passive simply by asking: Is someone actually doing the
action, or is the action being done to something?

For example:

"I did my homework." is active because I am doing the homework (active voice).
but if I say:

"The homework was done by me." it is passive because I am describing
action done to the homework.

Try and avoid the passive voice as much as possible.