5、hsD.are,fish()16.Theretwointhebox.A.iswatchB.arewatchesC.arewatchD.iswatches()17.Weshouldcleantwiceaday.A.ourtoothB.ourtoothsC.teethD.ourteeth()18.Our_____roomisnearthereadingroom.A.teacherB.teacher’sC.teachers()19.Tom and Jim are ___.A:friends B:friend C
6、:brother D:sister()20.How many_____do they have?A:picture B: pictures C:a picture三、用所给的单词的复数的正确形式填空:1>Therearethree______(chair)intheclassroom.2>These_______(tomato)arered.3>Mybrotherlooksaftertwo______(baby)4>Myfatherlikestoeat_______(potato).5>Chi