It was about 600 years ago _______ the first clock with a face and an hour hand was made.

MrSmith graduated from college at the age of 23, and ___________ he has been working as a teacher in a middle school

下列词语中有错别字的一项

Alice looks sad. Did you tell her about her brother’s accident?— Sorry, I ________ her just before her final exams.

Thanks fortaking my friends and me out tonight.—_________.