Everyone knows that _____ is dangerous to play with fire, but _____ is difficult is to prevent children from playing with fire.
| A．it, it | B．what, what |
| C．it, what | D．what, it |
（2012北京卷）If you’re buying today’s paper from the stand, could you get for me?
| A．one | B． such | C． this | D． that |
-John, when shall we meet again, Thursday or Friday?
-_________.I’ll be off to London then.
| A．Either | B．Neither | C．Both | D．None |
（2012江西卷）My brother would like to buy a good watch but was available from that shop.
| A．nothing | B．none | C．no one | D．neither |
New technologies have made ____ possible to turn out new products faster and at a lower cost.
| A．that | B．this | C．one | D．it |
Sarah made ______ to the airport just in time to catch her plane this morning.
| A．herself | B．this | C．that | D．it |