the high school, he had difficulty infinding a job and led a tough life

There is a system ________the waste is disposed of using the principles of ecology.

As a doctor，I that I will be kind to my patients，love them and do my best to save their lives. That is my promise.

Today acupuncture(针刺疗法) has become popular round the world, _____ other traditional Chinese medicines.

ing_____ gift they wanted, the kids screamedwith _____ delight