_____ all the inventions have in common is ______ they have succeeded.
| A． What; what | B． That; what |
| C． What; that | D． That; that |
As many as five courses are provided，and you are free to choose ________ suits you best.(2012·陕西)
| A．whatever | B．whichever | C．whenever | D．wherever |
________ wants to stay in a hotel has to pay their own way.
| A．Anyone | B．The one | C．Whoever | D．Who |
It was never clear ________ the man hadn't reported the accident sooner.(2011·江苏)
| A．that | B．how | C．when | D．why |
It doesn't matter ________ you turn right or left at the crossing—both roads lead to the park.
| A．whether | B．how | C．if | D．when |
________ was most important to her，she told me，was her family.
| A．It | B．This | C．What | D．As |