This is a picture of Dr. Yuan, a scientist ____ is well known in our country.
Not until quite recently that language is closely related to culture.
Many of friends British people make at school remain friends for life, so it is true that schooldays are “the best of life”.
__________ , she won’t talk to you after what you said to her.
_______ laws of motion are simple, motion, as we see it in the world about us, certainly is not.
They stood on the top of the high building, ________ they could see the whole city.