-- Our dreams won’t come true __________ we know what our dreams are.
| A．after | B．unless | C．while | D．since |
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 |