e girl has fallen off her bicycle,and her knees _________

some people are motivated(激励)by a need for success, others are motivated by a fear of failure.

May I take this book out of the reading room?—No，you ________.You read it in here.

Keep quiet, please! You must know talking loudly________ in the reading room.

The islands developed on their own for 80million years and ________ have many rare animals found nowhere else