.What sets human beings apart from animals is not the pursuit of happiness, but the pursuit of meaning, ________ is unique to humans.
That region has a lot of natural resources while this one has ________.
—Do you love teaching, Miss He?—I fell in love with teaching in 2000. I ________ for twelve years by this summer.
You didn ’ t let me drive. If we _____ in turn, you ______ so tired.
His writing is so confusing that it's difficult to make out ________ he is trying to express.
It’s extremely dangerous for the drivers to _______ speed as the traffic lights are changing.