---We all wonder ____ the relationship between France and China is good again now?
---Because the two countries have common national benefits.
| A．why it is that | B．why it is | C．that it is why | D．it is why |
________ matters most in learning English is enough practice.
| A．What | B．Why | C．Where | D．Which |
Before a problem can be solved, it must be obvious ________the problem itself is.(2011·湖南)
| A．what | B．that | C．which | D．why |
I'd like to start my own business–that's ________ I'd do if I had the money.(2011·陕西)
| A．why | B．when | C．which | D．what |
It was never clear ________ the man hadn't reported the accident sooner.(2011·江苏)
| A．that | B．how | C．when | D．why |
I am afraid he's more of a talker than a doer, which is ________ he never finishes anything.(2011·山东)
| A．that | B．when | C．where | D．why |