The engineers in this lab spent several weeks _______their plans for the new bicycle.
A、countingC
暂无解析
Thisriverissobigthatitisimpossibletobuilda_______underitwithoutmoderntechnology.
Withthe_______ofMary,allthegirlstudentsareeagertogototheparty.
Thismorningintheclass,ourteacherlosthis______atlastbecausehecouldnotstandanymore.
Manykindsofanimalsarebelievedtohave_________fromtheearth
Althoughthetrfficisnotbusy,helikestodriveata_______speed.
