Write the sentences with for or Use the verbs in the present perfect. Viết lại câu sau với từ for và sửu dụng thì hiện tại hoàn thành. a) I/ own/ this Computer/ three years. I have owned this Computer for three years. b) They/ visit/ the Silicon Valley/ last November. c) Nam/ be/ happy/ he had a d) We/ learn/ Computer Science/ a e) She/ work/ at our school/ the year 2000. f) I/ use/ those programs/ two years. g) The printer/ stop working/ this morning. h) They/ know/ the name of the company/ a long time. i) He/ read/ the book/ 9 o’clock. Hướng dẫn giải a. I have owned this computer for three years. b. They have visited the Silicon Valley since last November. c. Nam has been happy since he had a computer. d. We have learned computer science for a moth. e. She has worked at our school since the year 2000. f. I have used those programs for two years. g. The printer has stopped working since this morning. h. They have known the name of the company for a long time. i. He has read the book since 9 o’clock.