Đổi thành Câu hỏi đuôi
17, Bill couldn’t have prevented it
18, Bill hasn’t got a car
19, there weren’t any mosquitoes
20, George hadn’t been there before
21, you would’t mind helping me with this
22, you take sugar in tea
23, but you don’t take it in coffee
24, it never works very well
25, mary hardly ever cooks
26, she’d save money if she bought fresh food
27, neither of them offered to help you
28, he hardly ever leaves the house
29, nothing went wrong
30, there used to be trees here
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Sinh Học lớp 12
