Question

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Complete the reading, using the passive voice form, present, past, or future.

The Wilmington Bird Sanctuary

The main purpose of the Wilmington Bird Sanctuary is to help and protect birds. Each year hundreds of birds -……………………….. ( find ) with broken wings or legs and they need help and care. These birds………….......…………. ( bring) to the sanctuary and they ………………………………….. (take care of) by experts. All the birds …………………………. ( keep ) in large cages, they ………………………… (feed ) twice a day and their cages ……………………….. ( clean ) three times a week.
The sanctuary ……………………….. ( visit ) by many people every year. They ……………………………...
( show ) around the sanctuary and they …………………………….. ( inform ) about the different species. Entrance to the sanctuary is free, but visitors ………………………. ( ask ) to give whatever they can. This money ………………………. ( use ) to improve the sanctuary and make the birds’ stay a more pleasant one. However, this bird…………………………….. ( not keep ) at the sanctuary longer than necessary. As soon as they are well again, they …………………………….. ( return ) to the wild forest.

Complete the following passage about the moon with either present or past passive forms of the verbs in parentheses.

The moon and the earth

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 formed a triangle. This imaginary triangle ……………………… (use) by ancient astronomers to calculate the real distance to the moon. Although this method was fairly accurate, it ……………………….. (not use) anymore. Today, laser beams ………………………… (use) instead. In the 1970s, mirrors …………………….. (place) on the surface of the moon. Now, laser beams from the earth……………………….. (reflect) by the mirrors, and the moon’s position ………………………. (measure) to the nearest few centimeters. Its average distance from earth is 384,000 kilometers (equal to traveling around the earth ten times).

Answer 1

Respuesta:

are found,  are brought , are taken care of,  are kept,  are fed,

are cleaned,  is visited,  are shown,  are informed,  are asked.  is used,  isn't kept (esto está mal. El texto debería poner "These birds" y pondríamos "aren't kept" en el hueco), are returned/will be returned

was calculated, were made, were taken, was used, isn't used, are used, were placed, are reflected, is measured,

Explicación: