Fill in the blanks with the suitable (active or passive) form of the verbs in brackets:

Once a valve…………. (damage) beyond repair, as happens with recurrent attacks of a rheumatic fever, the only way to save the patient, …………(be) to replace it. Almost all replacements …………(do) today using mechanical devices. Among the earliest …………(be) the ball-and-cage valve which …………(invent) in 1961 by Albert Sterr, a surgeon of Portland, Oregon, USA and his collaborators M. Lowell Edwards. It …………(have) a plastic ball in a stainless steel or titanium cage. But the device ……………(have) several disadvantages. The presence of the ball…….. (cause) severe turbulence and cavitation which also ………………(cause) damage to red blood cells leading to the risk of clot formation. It ……………… (be) therefore necessary to put the patient on a long term anticoagulant therapy.

 has damaged

is

is done

was

has

has

will cause

causes

is

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1.)Is damaged.

2.)Is

3.)Are done

4.)Was

5.)Was invented.

6.)Has

7.)Has

8.)Has

9.)Causes

10.)Causes

11.)Is.

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Kavya did some mistakes.I have written them in bold letters.

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  VFDF
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1)Damages
2)is
3)is done
4)is
5)was invented
6)has
7)has
8)causes
9)causes
10)is
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Mera lond khada hai gand mar lung a tum sabki
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Dear,
Active passive is not really tough
It always like a game....
Just like...
Tere mast mast do nain mere Dil Ka le Gaye chain ....mere mast mast do nain tere Dil Ka le Gaye chain...
Thank you..
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I now this answer
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Who are father
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Damaged
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You are poor teaching

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Hi friend
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What are you looking for?