Tìm x:
a)(x+3)²-4x-12=0
b)x(x+5)(x-5)-(x-3)(x²+3x+9)=7

Put the verbs in brackets in the Present Simple or Present Progressive.

1. I'm afraid I have no time to help you now. I (write) _____ a report. But I (promise) _____ I'll give you some help later. 

2. Look, it (rain) _____ outside. The rain (get) _____ heavier. 

3. Remember that the sun (rise) ______ in the east. It's behind us so we (travel) ______ west.

4. The students (celebrate) _____ Students' Day tomorrow.

5. Hoa (have) _____ a birthday party this evening. 

6. She (get) _____ taller and taller this year. 

7. They (prepare) _____ for their next performance. 

8. The Greens (go) _____ to the movies once a week. 

9. There (be) _____ a traffic jam in the city center almost every day.

10. Where is Mai? What (she / do) _____?