Parents are supposed to monitor their children on the Internet, in case some bad information would teenagers’ mind.
-Do you know what Lily is doing? -She _______ in the office.
-Hi, Terry, can I use your computer for a while this afternoon? -Sorry. _______.
My sister wants to work in that tall building which ______still _______.
-Why do you come to work on foot today? -Well, my bike _______ and I hate taking a crowded bus.
-Some measures have been taken to prevent the environment from being destroyed. -Yes. And the wildlife in this area _______.