Brave William Baldock, who is six years old, is a hero...

Câu hỏi: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer for each of the blanks from 25 to 29.
Brave William Baldock, who is six years old, is a hero after helping his mother when she fell downstairs. William quickly rang (25) ___________an ambulance when he discovered his mother had broken her leg. In spite of being frightened, he told 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 (26) ___________. While waiting for these people to come, William looked after his 18-month-old sister.
When ambulance man Steve Lyn went to the house, he was amazed: 'It's (27) ___________that a young boy of six knew the right number to (28) ___________and was able to give us the correct information.'Mrs. Baldock left hospital yesterday, very (29) ___________to both William and the ambulance service.
The word or phrase which best fits the gap (29) is...
A. agreeable
B. happy
C. grateful
D. approving