It suddenly occurred to him________he had left his keys in the office. (2012·江西，25)
| A．whether | B．where |
| C．which | D．that |
The door and the windows were all closed and there was no ______ of forced entry.
| A．scene | B．signal | C．sign | D．sight |
Remember that there is still one point ______ we must make clear at the conference tomorrow.
| A．where | B．why | C．when | D．that |
______the website of the Fire Department in your city, and you will learn a lot about firefighting.
| A．Having searched | B．To search | C．Searching | D．Search |
She is working hard all day long, which will surely ______her success in her future work.
| A．result from | B．contribute to | C．benefit from | D．stick to |
It is generally considered unwise to give a child ________ he or she wants.
| A．however | B．whatever | C．whichever | D．whenever |