sorLi always allows his students to voice their opinions in class, ______sometimes their opinions are not sound

She is a _______. He is a _______.

It’s said in the newspaper the 215 more new schools ______ in Zhengzhou by 2020.

The purpose of the newly-invented robots which can help bathe people is to the dignity and privacy of patients.[ ]

r more information, please send an e-mail, ______ you can also include your advice to us.