After her time in hospital, Jenny's parents are afraid she has _____ in her lessons.
| A．fallen behind | B．fallen down | C．fallen back | D．fallen off |
.
Over the past decades, sea ice _____ in the Arctic as a result of global warming.
| A．had decreased | B．decreased | C．has been decreasing | D．is decreasing |
.
After some time in the dark cave, our eyes slowly _____ the dark.
| A．used to | B．adapted to | C．accustomed to | D．helped to |
.
Seldom out time to watch TV on Sunday.
| A．I can squeeze | B．can I squeeze | C．squeeze I | D．I squeeze |
.
Steven Hawking’s conclusion about the Black Hole is a little , but it has been accepted by most of the world.
| A．realistic | B．abstract | C．contemporary | D．appropriate |
.
_____ matters most in learning English is enough practice.
| A．what | B．why | C．how | D．Which |