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
– Can a plane fly _______ the Atlantic Ocean?
--Yes, but it needs to go _______ the clouds for hours.
A．across, through B．through, across
C．across, across D．through, through
The man is very ill and he has _______.
A．operate on B．to be operated on C．to operate D．being operated on
