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书山有路勤为径，学海无涯苦作舟。PAGE2/NUMPAGES2祝愿天下莘莘学子：学业有成，金榜题名！考点跟踪训练22 九年级 Units10—121、【单选题】WhywerethesyntheticballsexpectedtobeusedinNBAaccordingtothetext?[3分]A、Becausetheyareeasiertocontrol.B、Becausetheywastelessmaterial.C、Becausetheylookexactlyalike.D、Becausetheyfeelandbouncealike.答案：D;2、【单选题】?[2分]A、givenB、makingC、callingD、telling答案：C;3、【单选题】Theballiseasiertoholdonto________.[3分]A、whenfrictionisgreaterB、whenfrictionislessC、whenitisheavierD、whenitbouncesstrangely答案：A;4、【单选题】Bonnielooksverysmartandisalways________pinkbecausepinkisherfavoritecolor.[2分]A、withB、onC、aboutD、in答案：D;5、【单选题】?[2分]A、againstB、betweenC、besideD、with答案：B;6、【单选题】Thesyntheticballbouncesdifferentlyfromtheleatheronemainlybecause________.[3分]A、itiswetB、itisdryC、there’salogoonitD、itsweightremainsthesame答案：C;7、【单选题】—Whichcolordoyoulike__