Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Brave William Baldock , who is six years old , is a hero after helping his mother when she fell downstairs . William quickly rang for an ambulance when he discovered his mother had broken her leg . In spite of being frightened , he (1)_____ the emergency services what had happened and answered all the questions they asked him. He also telephoned his father at work, and then his grandmother, to explain what he had (2)______. While waiting for these people to arrive, William looked after his 18-month-old sister.

When ambulance man Steve Lyn went to the house , he was amazed: "It's great that a young boy of six knew the right number to deal and was able to give us the correct information.” (3)______ of William's quick thinking , we were able to (4)______ there immediately.

Mrs Baldock left hospital yesterday, very (5)______ to both William and the ambulance service.

Question 5.

A. agreeble

B. happy

C. grateful

D. approving

Có bao nhiêu loại oxit? Mỗi loại lấy một chất làm ví dụ

Phát biểu nào sau đây là đúng:

A. Trong dãy HF, HCl, HBr, HI, tính axit và nhiệt độ sôi của các chất tăng dần.

B. Theo thứ tự HClO, HClO₂, HClO₃, HClO₄, tính axit tăng dần, đồng thời tính oxi hóa giảm dần.

C. Trong công nghiệp, để thu được H₂SO₄, người ta dùng nước hấp thụ SO₃.

D. Các hợp chất H₂S, SO₂, SO₃ đều là các chất khí ở điều kiện thường

b dc bao nhiêu