Cho góc xOy bằng 60^o. Trên tia Ox lấy điểm A, vẽ tia Am sao cho góc xAm bằng 60^o (tia Am nằm trong góc xOy).
a) Chứng tỏ Am // Oy
b) Vẽ AH vuông góc với Oy (H thuộc tia Oy). Chứng minh AH vuông góc với Am.
c) Tính góc OAH?

Complete these sentences by putting the verbs in to the Past simple or Present perfect.

1.Yesterday, I (go)_____________ to the restaurant with a client.

2. We (see) _________________ him last month.

3. We (arrive) _________________ in Ha Noi two days ago.

4. She (not/come)_______________ here for a long time.

5. We________________________chicken Tandoori before. (never / try)

6. ___________you ever (eat)________________Sushi?