1. George (not, feel)…………………….well all day.

2. I (look)………………for you all morning. Where have you been?.

3. Lan (not, have) ……………………..a holiday for ten years.

4. I (look)………………for you all morning. Where have you been?.

5. Lan (not, have) ……………………..a holiday for ten years.

6. He (smoke) ……………………….too much recently. He should smoke less.

7. I (receive)………………3 letters  today.

8. Don’t try to use that telephone. It ( not, work)………………..

9. They (not, do)……………………their work yet.

10. I can’t find my bag. You (see)…………….it?

11. It (rain)…………………………for two hours.

12. You (be) asleep all the morning? I (ring) the bell for the last 5 minutes.

13. We (never, have) ……………………..a car.

14. Mary looks sunburnt. She (sit)…………………….in the sun?

15. You (ever, eat)……………salmon?

16. I (swim)………………………….That’s why my hair is wet.

1.      You (beat) …………………….the eggs and then you (add)………………… the flour.

2.    The match ( start)……………… at 7.30 tomorrow evening.

3.      I ( meet)……………… Tom at the airport  tomorrow after noon.

4. I (just, come)……………..back from Italy.

5. She ( always/forget) ....................... pencils when she goes to school

6.      Jonh isn’t lazy. He (work)………… very hard most of the time.           

7.      I (take) ……………an oral examination tomorrow morning.      

8.    I (write)…………………….. in reply to your advertisement in the Daily News.

9.      You can’t go out now because it ( rain)……….and I (not, have)……… and  umbrella.

10.      She often (sing)…………… in Chinese but today she (sing)………. in English.

11. When he ( finish)………………. his work, he will help you                               

 I always( make)…………………… silly mistakes.

1.      Her sister (watch) …………………………the film for two hours but she does not want to stop it.

2.       It is the first time she (tell) ……………………………her truth to me.

Cho x ∈ (0;\(\dfrac{\Pi}{2}\)) và sinx=\(\dfrac{\sqrt{3}}{2}\) . Khi đó cos\(\dfrac{x}{2}\) bằng

A. \(\dfrac{\sqrt{3}}{2}\)

B. \(\dfrac{1}{2}\)

C. \(-\dfrac{1}{2}\)

D. \(-\dfrac{\sqrt{3}}{2}\)

Trình bày giúp mình nhé

Đơn giản biểu thức

A= 2cosx + 3cos( π - x) - sin ( \(\dfrac{7\Pi}{2}\) - x ) + tan ( \(\dfrac{3\Pi}{2}\)- x )

Cho α ∈ (0;\(\dfrac{\Pi}{2}\)) và tan α = 3. Khi đó sin(α +π) bằng

Cho x ∈ (0;\(\dfrac{\Pi}{2}\)) và sinx=\(\dfrac{\sqrt{3}}{2}\) . Khi đó cos \(\dfrac{x}{2}\) bằng

A.\(\dfrac{\sqrt{3}}{2}\)

B.\(\dfrac{1}{2}\)

C. \(-\dfrac{1}{2}\)

D.\(-\dfrac{\sqrt{3}}{2}\)

1/ Why (you/wait) outside the door?

2/ Don’t ask Tim. He (not/know) the answer.

3/ I (not/understand). What (happen)?

4/ Be quiet! My son (sleep)

5/ My students sometimes (not have) equipment to study in the class.

6/ What they usually (do) at the weekend?