—When did you buy the computer?—I have ______ this computer for 5 years, but it still works well.
– Do you know ________? – Oh, I know he was born in 1929.
– I think we can have a long time to relax this summer! –______. We should get ready for high school.
– _____ do you think of studying abroad, Lingling? – Well, it all depends! I prefer studying at home.
– Who didn’t turn off the light after school yesterday? – It ______ be Lucy. She told me she was the last one to leave the classroom.
Think before you write, ______ you will get good grades in the exam.