The computer, ______________ help we human beings have stepped into the information age, should be made full use of to promote the social development.
| A．which | B．whose | C．with its | D．with whose |
—— Have you seen＿＿＿pen? I left it here this morning．
—— Is it＿＿＿black one? I think I saw it somewhere．
| A．a； the | B．the； the | C．the； a | D．a； a |
Many people agree that＿＿＿knowledge of English is a must in＿＿＿international trade today．
| A．a；／ | B．the； an | C．the； the | D．／； the |
How beautifully she sings! I have never heard＿＿＿＿．
| A．the better voice | B．a good voice | C．the best voice | D．a better voice |
If there were no examinations, we should have＿＿＿＿＿at school．
| A．the happiest time | B．a more happier time | C．much happiest time | D．a much happier time |
She is＿＿＿＿＿new comer to＿＿＿＿chemistry but she has already made some important discoveries．
| A．the； the | B．the；／ | C．a；／ | D．a； the |