Ifyouhaveanyproblemsduringyourstudyhere,pleasedonot_______tocallmeforhelp
A、hesitateManykindsofanimalsarebelievedtohave_________fromtheearth
Pleasebeserious.Iamnot_______.Youshouldconsideritcarefully
Bothsugarandsaltcan______inwater.
Healwayshasalotof_______ideasinhismind,andsometimeswedonotevenknowwhatheisthindingabout.
Thisriverformsanatural_______betweenChinaandKorea.