We should take ____ active part in the battle to stop the germs.A.the B.an C. /
—When did you buy the computer? —I have ______ this computer for 5 years, but it still works well.
—How are you feeling here? —It’s quite hot.I don’t know ______ to go or stay.
—I have never been to the space museum. —______.
—Have you had a new apartment in 2014 ______? —Yes, I have ______ had one.
—Are Betty and Lingling still living in Beijing? —No, they ______ to Hong Kong.