21. —The room is so dirty. ____ we clean it?
—Of course.
A. Will B. Shall C. Would . D. Do
22. —The boys are not doing a good job at all, are they?
—___________.
A. I guess not so B. I don t guess
C. I don’t guess so D. I guess not -
23. —I m sorry I m calling you so late.
—_________ okay.
A. This is B. You’re C. That’s D. I’m
24. There s ____ dictionary on ____ desk by your side.
A. a; the B. a; a C. the; a D. the; the