Vẽ hai góc kề bù xOy và yOz, biết x O y ^ = 70°. Vẽ Ot là tia phân giác của góc yOz.

a) Tính số đo góc yOz và yOt.

b) Tính số đo góc xOt.

Biểu diễn trên tia số các số tự nhiên nằm giữa điểm 2 và điểm 8. Viết tập hợp X các số tự nhiên đó

Choose the letter A, B, C or D to complete the passage below

In my last holiday, I went to Hawaii. When I went _________ (6) the beach for the first time, something wonderful happened. I was swimming in the sea while my mother was sleeping in the sun. My brother was building a castle and my father _________ (7) some wine. Suddenly I _________ (8) a boy on the beach. His eyes were blue _________ (9) the water in the sea and his hair was beautiful black. He was very tall _________ (10) thin. My heart beat fast. I asked him for _________ (11) name with a shy voice. He told me _________ (12) his name was John. He stayed _________ (13) me the whole afternoon. In the evening, we met again. We _________ (13) pizza in a restaurant. The following days we had _________ (14) fun together. _________ (15) the end of my holidays when I left Hawaii I said good-bye to John. We had tears in our eyes. He wrote to me a letter very soon and I answered him. We continued to be good friends.

Question 14:

A. many

B. a lot of 

C. a number of

D. plenty