20. The artist tried (stimulate) (interest in) painting (by taking) his students (to the) museums. 21. Mumps (are) a very (common disease) (which) (usually) affects children. 22. Nancy said (that) she (went)(to) the supermarket (before coming) home 23. (Before) she moved here, Arlene had (been) president (of the) organization (since) four years. 24. Each (of the) nurses (report) to the operating room when (his or her name)( is called) 25. (The athlete) together (with) (his coach) and several relatives (are) traveling to the Olympic Games. 26. Professor Duncan (teaches) (both) ( anthropologу)as well as sociology (each fall) 27. My brother is (in) California (on) vacation, but I wish he (was) here so that he could help (me repair my car) 28. I (certainly) appreciate (him) (telling us) about the delay in (delivering) the materials because we had planned to begin work tomorrow. 29. The chemistry instructor explained the experiment (in) (such of a way) that it (was) (easily Understood) 30. Rudolph Nureyev (has become) one of the (greatest) (dancer) that the ballet world has (ever known)