54. Every student and every teacher (was, were) late for school.　

53.Either the girl or the boy (know, knows) me very well.　

51.Half of the class (has, have) done most of the work.　

her Mary nor her parents (have, has) been to Australia.　

49.Each man and each woman (is, are, has, were) asked to attend the party． 50.What (do, does) people mean in Chinese?　

48.The police (is, are) searching the robber.　

47.Ten minus six (is, are) four.　

46.One third of the students in our class (was, were) late yesterday.　

45.Half of the sheep (like, likes) to eat this kind of grass.　

44.At the head of the queue (was, were) my parents.　

43.Nothing (has, have) happened outside.