In the past decades, sea ice _____in the Arctic as a result of global warming.
| A．had melted | B．has been melting | C．melted | D．is melting |
—How about your journey to Mount Tai ?
—Everything was wonderful except that our car ____twice on the way.
| A．slowed down | B．broke down | C．got down | D．put down |
The traffic lights ______ green and I pulled away.
| A．came | B．grew | C．got | D．went |
Someone who lacks perseverance is unlikely to _______ a good researcher.
| A．make | B．turn | C．get | D．grow |
______ acupuncture developed, the simple “bian stones” were replaced first by stone and pottery needles, and ________ by metal needles.
| A．As ,eventually | B．With, eventually |
| C．With, accidentally | D．As,accidentally |
Most of our dreams that used to be impossible have ________ true.
| A．came | B．come | C．gone | D．appeared |