Class 10 Tenses Worksheet | Gap Fills
Fill in the blanks with an appropriate verb form. This English grammar worksheet will be helpful for students of classes 9 and 10.
Class 10 Tenses Worksheet | Gap Fills
A group of Israeli scientists …………………. (grew / has grown / have grown) a tiny beating ‘heart in a dish’. The laboratory reared tissue …………………… (would / should / could) one day be used to repair heart attack damage, ……………………. (prolong / prolonging / prolonged) and improving the quality of life for millions around the world. It could also cut the need for heart transplants.
The research team …………………… (uses / used / use) human embryonic stem cells to grow immature heart cells. The cells ………………….. (were / have / are) then placed on a framework of biodegradable sponge where they knit together and grew. The result was a tiny piece of heart muscle less than one centimeter square …………………. (thread / threaded / threading) with minute blood vessels. It has a beat – continually contracting and relaxing in the same way as heart muscles. The pieces of heart tissue thus ………………….. (grow / grew / grown) can be grafted to the heart. The researchers now …………………. (hope / hoping / hoped) to refine the technique to create sections big enough to replace muscles scarred by heart attack.
Solution
A group of Israeli scientists has grown a tiny beating ‘heart in a dish’. The laboratory reared tissue could one day be used to repair heart attack damage, prolonging and improving the quality of life for millions around the world. It could also cut the need for heart transplants.
The research team used human embryonic stem cells to grow immature heart cells. The cells were then placed on a framework of biodegradable sponge where they knit together and grew. The result was a tiny piece of heart muscle less than one centimeter square threaded with minute blood vessels. It has a beat – continually contracting and relaxing in the same way as heart muscles. The pieces of heart tissue thus grown can be grafted to the heart. The researchers now hope to refine the technique to create sections big enough to replace muscles scarred by heart attack.
