With the development of science and technology, people’s life _______ in the past few years.
| A．improved | B．has improved |
| C．is improving | D．had improved |
The space station spins slowly in ________ space to imitate ________ pull of the earth’s gravity.
| A．the; / | B．/; the | C．/; / | D．the; the |
The old man was so angry and spoke so fast that none of his children understood ____ he said meant.
| A．that, that | B．what. what | C．what | D．that |
Listen to the two girls by the window. What language _____?
| A．did they speak | B．were they speaking |
| C．are they speaking | D．have they been speaking |
.Mary takes great ____ in learning pop music.
| A．delight | B．happy | C．joy | D．fond |
The computer system ____ suddenly while he was searching for information on the Internet.
| A．broke out | B．broke down | C．broke up | D．broke in |