Are these your cousins? _______ .
--- Is Mr. Smith in his office now?--- No, he there. I saw him in the library a minute ago.
--- Nancy, apple on the table is for you.--- Thanks. An apple a day keeps the doctor away.
_______ you study harder, you’ll fall behind others.A. If B. Unless C. Until
She _______ the computer since 2001.A. has had B. has bought C. had
In the past 10 years, great changes ___________ place in Beijing.A. took B. have taken C. have took