—The country has already sent up an unmanned spacecraft to the moon.
—Yes. Chang’e I to the moon last October.
| A．has been sent | B．has sent | C．was sent | D．sent |
Jane’s mother preferred __________ TV at home to __________ to the concert.
| A．to watch; go | B．watching; going |
| C．watching; go | D．to watch; going |
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 |