31.The number of the books on the desk (is, are) ten.　

30.They each (has, have) a good book.　

29.None of them (is, are) workers.　　　

28.None of them (is, are) a good teacher.　

27.All (has, have) come to the party.　

26.More than one boy (has, have) been to the USA.　

25.The shoes under the bed (is, are) mine.　

24.There　 (is, are) a pair of shoes under the bed.　

23.Three years (has, have) passed since he left here.　

22.A woman with 2 boys (is, are) working in the field.