1. let me borrow three books.
(let sb do sth = allow sb to do sth: cho phép / để ai làm gì)
2. don't mind teaching you how to use the software.
(happy to do sth = don't mind doing sth: không phiền làm gì)
3. We are going to spend our holiday in Hong Kong.
(plan: dự định, lên kế hoạch làm gì; be going to + V: thì tương lai gần => dự định, kế hoạch sẽ xảy ra)
4. had better not make them angry.
(had better not do sth: không nên làm gì)
5. It is her duty to record the cafe expense.
(be responsible for ... = one's duty to V : có trách nhiệm làm gì)
Her duty is to record the cafe expense.
6. According to some family experts, single-parent family will be more and more common in the future.
(According to sb: theo như ai đó)
7. is likely that they will come late for the meeting.
(It is likely that + S + V : có vẻ như)