Ihavenotheardanythingfromhimsincehis_______.
A、departureManykindsofanimalsarebelievedtohave_________fromtheearth
The_______workcontinuedformorethanaweekbuttherewasstillnosignofthemissingboy.
The_______isnearlydead,soIcannotstartthecaragain.
ProfessorSmithisalsothe_______oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
Theengineersinthislabspentseveralweeks_______theirplansforthenewbicycle.
