—Haven't I seen you some place before?

—Yes. That's ________ I don't go there anymore.

A．because  B．how

C．why  D．when

His writing is so confusing that it's difficult to make out ________ he is trying to express.

A．what is it  B．what is it that

C．what is that  D．what it is that

I couldn't imagine ________ difficult it was for these badly injured victims to make it to the hospital.

A．when  B．how

C．what  D．where

After a day's exhausting climb we arrived at ________ we had been told was Garden in the Air.

A．what  B．which

C．that  D．where

The mother, who is strict with her two daughters, has a clear list of ________ they are not permitted to do.

A．why  B．how

C．what  D．which

Rosa regretted giving her opinion about the decision directly, feeling ________ she should have expressed it differently.

A．how  B．why

C．that  D．if

You must notice ________ the emergency exit is when you enter the building.

A．which  B．where

C．what  D．in which

Although he has become wealthy, Mr. Wood remains ________ he used to be, modest and friendly.

A．when  B．where

C．how  D．what

—How do you think I can make up with Tom?

—Put aside ________ you disagree and try to find ________ you have in common.

A．what; what  B．where; what

C．what; whether  D．where; whether

—I wonder ________ so many people are crazy about Gangnam Style.

—It's good for bodybuilding, and it brings people a lot of fun, you know.

A．how  B．where

C．why  D．that