Wehadn'tmetfor20years,butIrecognizedher_____Isawher.
Theprofessorsaidhecouldtalkon_____interestedtheaudience.
ProfessorWang,_______forhisinformativelectures,waswarmlyreceivedbyhisstudents.
Thisrobotissupposedtosavealotoflabor,butitremainsaproblemifit______.
MytrainarriveinNewYorkateighto'clocktonight.TheplaneIwouldliketotakefromthere______bythen.