The professor worked for 7 hours at a ________.
A
此题考查的是固定词组搭配。atastretch一口气地
Agoodworkerinakeyspotcould,so_______ashekeptupproduction,takeallthecoffeebreakshewanted.
Wordsthatareidenticalonlyinspellingbutdifferentinsoundandmeaningarecalled______.
ModernEnglishvocabularydevelopsthroughthefollowingchannelsEXCEPT______.