. The boy lost his parents in such a terrible earthquake, so he was ______by the government.

In the experiment we kept a watchful eye __________ the development and recorded every detail

Have you read the book Oliver Twist— Who_______it

Could you tell me _____________—Every four years. The 24th will take place in China in 2022.

n D gets produced when animals are exposed to direct sunlight, for＿reason, itis always advisable to give them chances to spend time in the sun.