1£®At present a public bicycle is rented and returned four times a day on average.

2£®I was very alarmed to hear the alarming news that another earthquake had hit his hometown.(alarm)

3£®To achieve harmony between humans and animals, the world must protect these beautiful creatures.(creature)£®

4£®This book is_intended (intend) for beginners, and is now very popular in China.

5£®Nature reserves have protected many endangered (endanger) animals from dying out.

6£®He had his bad tooth removed (remove) yesterday, so he can't eat anything today.

7£®People are_reminded (remind) that no smoking is allowed in these patient rooms.

8£®What's more, something should be done to raise people's awareness (aware) of protecting animals.

9£®That's why I think the trip along the Yangtze River is a better choice.

10£®As is known to us, the People's Republic of China came into existence (exist) as an independent country in 1949.