A serious study of physics is impossible________some knowledge of mathematics.
| A．against | B．before |
| C．beyond | D．without |
If you like art and enjoy looking at the pictures, ________ is an interest.
| A．which | B．that | C．as | D．what |
___many times, the determined man didn’t give up and was finally offered a position in the firm.
| A．Being refused | B．Refusing | C．Having been refused | D．To be refused |
In case of fire, stay low to the ground in a smoky room, ________ smoke always rises towards the ceiling.
| A．as | B．when | C．while | D．once |
Everything on the news ________ a whole new meaning when you have a personal connection with the people.
| A．takes up | B．takes on | C．takes away | D．takes off |
Girls used to take fewer advanced math courses than boys but now they are taking just _______.
| A．as much | B．so much | C．as many | D．so many |