21.. We will do everything we can _____ out city and people.
A. to save      B. save      C. save to        D. saving
22.     Every girl and every boy _____ the right to join the club.
A. have        B. has       C. will has        D. there is
23.     Neither Tom nor Jack and I ______his students, but each of us _____ gone to the hospital to see him.
A. am; has     B. is; has      C. are; has        D. was; have
24.     What they need most _____ money while what we need most _____ textbooks.
A. were; is      B. are; is     C. was; are       D. is; are