1、Expertshavefoundthatnormalsleepcanbedividedintofive______stages
A、moderate
B、initial
C、distinct
D、advanced
2、Studentsshould（）theirowninterestsaswellasdotheirschoolwork.
A、persuade
B、pursue
C、persist
D、proceed
3、I'dliketoremindyouthatthereisno_____onthepartofsuspectstoanswerquestions.
A、obligation
B、evidence
C、transaction
D、motivation
4、Heblamedhispoorperformance_____jetlag
A、to
B、for
C、on
D、at
5、We_____knowledgefromourfamilies,schools,jobs,andthemassmedia
A、request
B、require
C、inquire
D、acquire