Móc một quả nặng có thể tích 50 cm3 vào lực kế, chỉ số của lực kế là 1,35 N. Nhúng chìm quả nặng đó vào trong cốc nước, chỉ số của lực kế thay đổi như thế nào? Vì sao

Give the correct form of the verbs in brackets.

1.The sewing machine which you (use) ........................................at present

( invent )..........................in 1830 by a French .

2. Last night when we (visit)……………… him he (do)………………. and experiment on the upstairs.

3. Please continue your work, we don’t mind (wait)...............................

4. Where you (spend) your summer holiday last year ?.........................

5. John (wash) .............................his hands. He just (repair)………………… the TV set.

6. My aunt (not be) .......................................out of his house since she (buy)………………………… a color TV.

. Use the suggestions to make the meaningful sentences

1. They/ very interested / play / badminton / when / like / city.

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2. I/ not take / aunt / since / she/ buy/ new house / city center

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3. You/ know / who invent / computer ?

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4. We/ ought / use cloth bags / instead / reuse/ plastic ones

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5. Weather / warm / sunny / day / and / cool / night

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