We believe ________ we can find out the wonder drugs to H7N9 bird flu.
A．when B．whether
C．what D．that
The Frenchman pointed to the spoon and asked me ________ to call that in Chinese.
A．whether B．where
C．which D．what
We have realized ________ she is expecting is just an opportunity to test her ability.
A．that B．which
C．what D．where
—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
