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。
Theoutlineofrooftopsandchimneys________againstthepalesky.
The students are required to ________ the main ideas of the article in their own words.
AlthoughTomissatisfiedwithhisacademicachievement，hewonders_______willhappentohisfamilylife.
Never before _______ so rapidly developing as it is today．