Pinetreesareusuallybelievedto_______coldweather.
Thismorningintheclass,ourteacherlosthis______atlastbecausehecouldnotstandanymore.
Manykindsofanimalsarebelievedtohave_________fromtheearth
Thisriverissobigthatitisimpossibletobuilda_______underitwithoutmoderntechnology.
ThecollegestudentsinChinaare_______fromsmokingoncampusbecausethiswilldothemnogood.