Signnatel Inc, ______ world's largest maker of controller chips for MP3 players, is set to establish _______ new R & D centre in Hong Kong and open two sales offices on China's mainland.
| A．the; a | B．the; the | C．a; the | D．a; a |
. --Can I help you, sir? --Yes, I bought the radio here yesterday, but it ________.
| A．didn't work | B．won' t work | C．can' t work | D．doesn't work |
While she _________ TV in the sitting room, the bell________.
| A．watches, rings | B．is watching, rang | C．was watching, rang | D．watched, was ringing |
.--Can I help you? --Yes. I bought this computer here yesterday, ,but it ______ now.
| A．didn't work | B．won't work | C．can’t work | D．doesn't work |
I _______ to bed until my grandma came back home.
| A．didn't go | B．went | C．had gone | D．have gone |
His sister read the picture- book three times yesterday, ___________.
| A．so he did | B．she did so | C．so did he | D．so ~lid her |