21. For a long time they walked without saying ____ word. Jim was the first to break _______ silence.
A. the; a B. a; the C. a; \ D. the;\
22. Being the eldest, she found the father took more interest in her progress than in _______ of her sisters.
A. that B. it C. one D. the one
23. —I phoned you at 7 o’clock last night but nobody answered.
—Oh, I ______ my dog in the park then.
A. was walking B. walked
C. had walked D. would talk