—I remember you were a talented pianist at college.Can you play the piano for me？
—Sorry,I___piano for years
| A．don’t play |
| B．wasn’t playing |
| C．haven’t played |
| D．hadn’t played |
We had intended to do everything according to the schedule, but it didn’t ______ as planned.
| A．make up | B．turn out | C．go on | D．come up |
Some people are sitting on the grass; others are walking along the lake, ______ .
| A．chatting and to laugh | B．to chat and to laugh |
| C．chatting and laughing | D．chatted and laughed |
Over years, scientists have made a great _____in the treatment of cancer.
| A．break-in | B．breakthrough | C．breakup | D．breakdown |
Many children think they are ______ with when their parents are trying to show concern about them.
| A．interfered | B．separated | C．disturbed | D．offended |
Some people argue using _____ nature to meet our own needs may spell disaster, unless we start to look around and understand how ______ clean environment benefits us all.
| A．/; a | B．the; the | C．the; a | D．a; a |