____________ Davy called me, I was sleeping.
| A．Until | B．When | C．While | D．Because |
________you don’t give up, your dreams will one day come true.
| A．If | B．Because |
| C．Unless | D．Though |
Look at the heavy rain! Nobody knows when the plane will _____ and when it will land.
| A．get off | B．take off |
| C．turn off | D．put off |
Yutu, China’s first moon rover(月球车), ________ at the center of attention since it flew to space last December.
| A．was | B．would be |
| C．has been | D．had been |
---What’s the world’s ______ national park？
--- It’s Yellowstone National Park in the US.
| A．old | B．older |
| C．oldest | D．the oldest |
Grapes are my favorite fruit, nothing else can ________ with them.
| A．deal | B．fight |
| C．play | D．compare |