67.（填空题）For ______ （secure）reason, passengers are requested not to leave any luggage unattended.

61.（单选题）Workers should wear full ______ clothing in the workshop.

60.（单选题）The hotel we stayed last summer was ______ cheap.

59.（单选题）He doesn’t like to live in ______ areas because of the noise.

58.（单选题）Had he worked harder, he ______ the exams.

57.（单选题）MARRIOTT INTERNATIONAL is a __________ lodging company with more than 3,200 hotels in the United States.

56.（单选题）The sun__________ in the east every morning.

55.（单选题）Many immigrants suffer from poverty____________ low income and lack of social insurance.

54.（单选题）My boss will always ____________ public relations ____________ whenever he thinks the company is in trouble

53.（单选题）We can__________ this information ____________ our report.

52.（单选题）The marketing team ____________ of twelve sales representatives.