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1 be used to sth. (同Unit 11--1)
2 should have done 本該做某事
4 have sth. done = ask sb. else to do sth.
5 Here, “she can help it” means “if she can other options or if it is possible for her to avoid”
enroll in = be involved in
6 Here, “wouldn’t you say” means “Do you agree with me that it is snowing?”
7 be out f = be lack of
8 swell (swelled - swollen) = get larger
9 fool around with = to waste time and behave in a careless, irresponsible way and not take it serious