It was never clear ________ the man hadn't reported the accident sooner.(2011·江苏)

A．that B．how C．when 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

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

________ matters most in learning English is enough practice.

A．What B．Why C．Where D．Which

The new technology will make ________possible to grow food with very little water.

A．it B．it is

C．that D．that is

The traditional view is ________ we sleep because our brain is “programmed” to make us do so.

A．when B．why C．whether D．that

Could I speak to ________ is in charge of International Sales，please?

A．anyone B．someone

C．whoever D．no matter who

You can only be sure of ________ you have at present; you cannot be sure of something ________ you might get in the future.

A．that; what B．what; /

C．which; that D．/; that

—Where's that report?

—I brought it to you ________you were in Mr.Black's office yesterday.

A．if B．when

C．because D．before

It is none of your business ________ other people think about you.Believe

yourself.

A．how B．what

C．which D．when