DoyouknowwhatthemostpopularhobbyisinAmericaNomatterwhereyougointheU.S.,youwillfindoneormoreverygoodgolfcourses.Bothmenandwomen,youngandoldtakepartinthissport.Therefore,you’llbetemptedtobelievethatgolfisthemostpopularhobby.However,itisn’t.

Itisn’’tquite_____thathewillbepresentatthemeeting. A: sure B: right C: exact D: certain

Itisn’tthefirsttimethatI_____myselfinanembarrassingsituation. A: havefound B: found C: finds D: wasfound

Itisn’tlikeaducktowatertolearnaforeignlanguage,soyoumuststudyhard. A: quick B: interesting C: easy D: free

.Itisn’training.There’sno________________. A: raining B: rain C: rains D: rained

―Isthatblackbikeyours?<br/>―No,itisn't,______isgreen. A: My B: Mine C: I D: Me

面心立方、体心立方和密排六方的空间利用率分别为__________________。 A: 74%、74%、74% B: 68%、68%、68% C: 74%、68%、74% D: 68%、74%、68%

面心立方、体心立方和密排六方的配位数分别为 A: 74％、68％、74％ B: 68％、68%、68% C: 68％、74%、68% D: 74％、74%、74%

面心立方、体心立方和密排六方的致密度分别为()。 A: 68%、68%、68% B: 74%、68%、74% C: 68%、74%、68% D: 74%、74%、74%

2.Isthis___magazine?-No,itisn’t.It’s___. A: your,her B: hers,mine C: yours,hers D: your,hers