What do you think of the person—Seldom in all my life ________ such a _________ person.

Recent researchhas the cause of the disease.

He found it increasingly difficult to read, ____his eyesight was beginning to fail.

We will build another new Great Green Wall________ the northern part of China.

You didn’t tell your parents the date of our graduation ceremony, did you — No, but I ____. My sister had told them.