The road becomes so crowded during rush hours, ______ it becomes a very slow route.
| A．which | B．when | C．where | D．that |
Tom was __________ a happy childhood, ______ most people would like to have.
| A．filled with; one | B．blessed with; one |
| C．covered with; which | D．laden with; which |
He had been _______ good terms with Tom, but all of ____ sudden they lost in touch with each other.
| A．on ; a | B．in ; / | C．on ; the | D．in ; a |
Imagine what today’s life would be like if Alexander Bell _____ the telephone more than 130 years ago!
| A．didn’t invent | B．wouldn’t invent |
| C．hadn’t invented | D．wouldn’t have invented |
Their sudden attack made us more ________ of the danger around us.
| A．familiar | B．particular | C．aware | D．doubtful |
Miss Li ___ as a secretary for five years in the company, and now she is general manager of it.
| A．has served | B．had served | C．served | D．serves |