Jack has been feeling down recently . I wonder that is making him so upset .
21. Every minute should he made full use of_______our lessons. ?
20. His sister left home in 1998, and______since.
19. He has made a lot of films, but___________good ones..
18. I can' t leave. She told me, that I_____stay here until, she comes back.
17. —Have you heard the latest news? —No, What______? A. is it B. is there C. am. they D. are those