Tenses Gap Filling Worksheet For Class 10

Complete the given passage using appropriate verb forms. This grammar worksheet is for students of classes 9 and 10.

The native Huichol community of the Sierra Madre mountain range of west central Mexico ……………1…………… (has / have / is) no access to electricity. The lack of electricity …………2………… (has / does / is) an adverse effect on the Huichol economy – the people can only work during daylight hours.

Now, a team of scientists …………3…………. (use / is using / are using) new technologies to provide the Huichol with light after the sun ……………4………… (sets / is setting / has set). The technique …………5………….. (involves / is involving / has involved) weaving tiny electronic crystals into fabrics that can be made into clothes, bags, or other items. Their inventors …………6……….. (name / are naming / have named) the textiles “Portable Lights.”

 At the core of Portable Light technology ……………7…………. (is / are / have) devices called high-brightness light-emitting diodes, or HB LEDs. When electric current ……………8…………. (is passing / passes / pass) through the LEDs, their crystal structure ……………9………. (vibrating / is vibrating / vibrates) and produces light.

The Portable Light team …………10……….. (weave / weaves / is weaving) two LEDs into a plastic-coated textile. When ……………11………… (turn / turned / turning) on, these LEDs can make the entire piece of fabric glow. The researchers use a new type of solar panel to tap sun’s energy. These panels can be easily ……………12…………. (sew / sewed / sewn) onto a piece of fabric. Circuits …………13………… (connect / connected / connecting) the solar panel to a lithium ion battery—the type of battery found in laptops and cellular phones. And the battery, in turn, ……………14………….. (connects / is connected / connecting) to the two LEDs in the fabric. A tough layer of plastic ……………15………… (protected / protects/ is protecting) the circuitry.

Answers

The native Huichol community of the Sierra Madre mountain range of west central Mexico has (1) no access to electricity. The lack of electricity has (2) an adverse effect on the Huichol economy – the people can only work during daylight hours.

Now, a team of scientists is using (3) new technologies to provide the Huichol with light after the sun sets (4). The technique involves (5) weaving tiny electronic crystals into fabrics that can be made into clothes, bags, or other items. Their inventors have named (6) the textiles “Portable Lights.”

 At the core of Portable Light technology are (7) devices called high-brightness light-emitting diodes, or HB LEDs. When an electric current passes (8) through the LEDs, their crystal structure vibrates (9) and produces light.

The Portable Light team weaves (10) two LEDs into a plastic-coated textile. When turned (11) on, these LEDs can make the entire piece of fabric glow. The researchers use a new type of solar panel to tap sun’s energy. These panels can be easily sewn (12) onto a piece of fabric. Circuits connect (13) the solar panel to a lithium ion battery—the type of battery found in laptops and cellular phones. And the battery, in turn, is connected (14) to the two LEDs in the fabric. A tough layer of plastic protects (15) the circuitry.