The machine _____ . It hasn’t worked for years and no one wants to repair it.
| A．didn’t work | B．wasn’t working |
| C．doesn’t work | D．isn’t working |
．—You've dropped ________ “s” in the word “acros”．
—Oh, ________ letter “s” should be doubled like this “across”．
| A．a; a | B．an; a | C．an; the | D．the; the |
We Chinese have a dream— ________ dream to turn a welloff life into ______ reality by 2020.
| A．a; / | B．the; / | C．a; a | D．the; the |
The teacher praised me for ________ progress I'd made, which was ________ great encouragement to me.
| A．the; / | B．the; a | C．/; a | D．/; / |
Liang Bo, the champion of the Voice of China, is a man of ________ few words but has ________ remarkable inner strength.
| A．/; a | B．a; a | C．the; / | D．/; the |
I ________ him in time, otherwise he would have fallen off the bike.
| A．had supported | B．supported |
| C．have supported | D．support |