.Wait till you are more ______. It’s better to be sure than sorry.
| A．inspired | B．satisfied | C．calm | D．certain |
— How did you do in your essay?
— I got ______ okay grade, but Mr．Jones gave Sarah top marks．She’s ______ teacher’s pet, you know.
| A．不填; a | B．an; 不填 |
| C．不填; the | D．an; a |
Volunteering gives you a chance _______ lives，including your own．
| A．change | B．changing |
| C．changed | D．to change |
The news came as no surprise to me．I _____ for some time that the factory was going to shut down．
| A．knew | B．had known |
| C．have known | D．know |
Dan Brown，_____ author of The Da Vinci Code，is _____ very famous American writer．
| A．a;the | B．the;the |
| C．the;a | D．a;a |
Jack，it’s too hot here．______ I open the window？
| A．Shall | B．Will | C．Should | D．Would |