When _______ comes to saving energy, big changes start with small steps, like turning off the lights.
| A．that | B．this | C．it | D．one |
_____ was most important to her, she told me, was her family.
| A．It | B．This | C．What | D．As |
—Why do you suggest we buy a new machine?
—Because the old one has been damaged ______.
| A．to repair | B．beyond repair | C．in repair | D．under repair |
－Hi ,Tom, why not attend my birthday party held last week?
－I am sorry, I had meant to, but I something unexpected.
| A．have met | B．had met | C．meet | D．met |
The newly discovered star was named a Chinese astronomer honour of his contributions to astronomy.
| A．for; in | B．after; for | C．as; in | D．after; in |
The evidence has ______ the first witness’s story.
| A．confused | B．accumulate | C．confirmed | D．attached |