21. It is considered to be almost a crime to ______ children to violence on TV.
A. contribute B. devote C. prefer D. expose 22. It took the police a long time to find some evidence. The new evidence led to ____________.
A. the robber having caught B. catch the robber
C. the robber being caught D. the robber to be caught
23. Every day the boy, together with his classmates, ______ to go to the playground and _____ football, ____ themselves.
A. are noticed; play; enjoying B. is noticed; plays; enjoying
C. are noticed; plays; enjoys
D. is noticed; play; enjoying
