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jamesconnor1016
2 năm trước
Cho tam giác ABC nhọn, B=60 độ nội tiếp đường tròn (O;3cm). Vẽ hai đường cao BE và CF cắt nhau tại H. a) Chứng minh tứ giác AEHF nội tiếp,tứ giác BFEC nội tiếp b) Tính độ dài cung nhỏ AC
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Underline the correct form. On 26 December 2004, Tilly Smith, a 10-year-old British schoolgirl (1) walked / was walking on the beach with her family. Suddenly Tilly (2) felt / had felt that something was wrong. She could see the water (3) had risen / was rising and waves (4) had come / was coming up the beach. The beach (5) get / was getting smaller and smaller. She (6) didn't know / hadn't know that there had been an Earthquake in Sumatra that morning, but she suddenly (7) remembered / had remembered a geography lesson she (8) was having / had had at school just two weeks before. She (9) told / had told her mother what she (10) was learning / had learned about earthquake and giant waves. Tilly (11) had started / started screaming at her parents to get off the beach. They (12) took / had taken Tilly back to their hotel and (13) raised / had raised the alarm. Thank to Tilly, everybody from that beach (14) survived / had survived that terrible day.

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