When my grandfather retired(退休) at the age of 60, he took a sea ________ around the world, which had been his dream since his childhood.
According to the Nobel Prize organization, Mo Yan’s work displays “a mixture of fantasy and reality, ______ historical and social aspects.
Care of the soul is a gradual process ______ even the small details of life should be considered.
Which materials can be thrown into the sea _______on the nature of them?
We should give students more chances to _______ the problems in their daily lives.
— I heard they went skiing in the mountains last winter. — It ___ true because there was little snow there.