— We are too busy to take ________ holiday at ________ present. — But I think we’ll be able to take ________ two weeks from now. A. a; /; one B. the; /; that C. a; the; it D a; /; it
______ we know, the air quality in the city has improved over the past two years.
We sometimes have to meet some difficulties, but we should develop a good attitude _______ life.
_______ never to come back, the boy left his home angrily.
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.
The newly-built house, the walls _______ are painted light green, is really a peaceful place for us, especially after hard work.