4.Listening to the radio at home is more interesting than going to the concert.
-> I prefer listening to the radio at home to going to the concert. (Cấu trúc prefer + sth/doing sth + to + sth/doing sth)
5. Can he take care of himself when his mother is away?
-> Can he look after himself when his mother is away? (Take care of = look after)
6. It took Mr. Hoang half an hour to walk to work yesterday.
-> Mr. Hoang spent half an hour walking to work yesterday. (It take SO + time + to V <-> SO spend + time + V-ing)
7. What is the price of this cap?
->How much does this cap cost? (HOẶC is this cap?