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31 tháng 10 2021

II) Fill in the blank with the suitable preposition

1. be keen on

2. be carved from

3. from

4. look forward to

5. with

6. be different from

30 tháng 10 2021

2 + 2^2 + 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 + 2^9 + 2^10

= (2 x 1 + 2^3 x 1) + (2 x 2 + 2 x 2^3) + (2^4 x 2 + 2^4 x 2^3) + (2^5 x 2 + 2^5 x 2^3) + (2^8 x 2 + 2^8 x 4)

số dư là 2^8 x (2 = 4) = 2^8 x 6 = 2^8 x 5 + 2^8 

2^8 = 256 : 5 dư 1

số dư là 1

30 tháng 10 2021

I. Supply the correct verb tenses or forms

1. Water (cover) covers most of the Earth's surface.

2. Look at those black clouds! It (rain) is raining.

3. She has a lot of novels (write) written  in English.

4. We are tired of (work) working for low salary

5. Would you mind if I (take) took a photo?

6. This is the second time you (break) have broken a cup.

7. I (just buy) have just bought a new shirt.

8. My brother came in while Tom and I (play) were playing chess .