The lifestyle we were used to ________ a lot these years.
A．changing B．changed C．has changed D．being changed
Excuse me. I _________ I was blocking(挡) your way.
A．didn't realize B．don't realize C．haven't realized D．wasn't realizing
Though the key was pressed, nothing ______ on the screen.
A．appeared B．was appeared C．appears D．is appeared
---You never have sweet snacks, do you?
---________. Though I know they’re bad for our health.
A．Yes B．No C．Yes, I don’t D．No, I do
He was often seen _________ with charity work last year.
A．to help B．helped C．helping D．help
Please don't stand up in class until you .
A．were told to B．are told to C．were told D．are told
