Thisriverformsanatural_______betweenChinaandKorea.
A、boundary
B、string
C、spot
D、zone
Freemedicalserviceis_______tonearlyallthecollegestudentsinChina.
A、favorite
B、available
C、convenient
D、average
Manykindsofanimalsarebelievedtohave_________fromtheearth
A、withdrawn
B、vanished
C、found
D、hung
Wecannot_______allthemagazinestogether.
A、route
B、draw
C、thread
D、bind
Withoutapropereducation,peoplecould_______allkindsofcrimes.
A、conduct
B、stoop
C、commit
D、sweat