A、ClassFour，GradeOne
B、GradeOne，ClassFour
C、Classfour，gradeone
About________percentoftheearth'ssurfaceiscoveredwithwater
A、29
B、82
C、71
D、100
Look!Lucyis______anewreddress.Sheisbeautifultoday.
A、with
B、puton
C、in
D、wear
Theofficebuilding_____theclassrooms
A、behind
B、behinds
C、isbehind
A、This
B、This's
C、Thisis
D、That