Is this museum ______ the students visited last year?
Life is ten percent ________ happens to you and ninety percent ________ you respond to it.
We believe ________ we can find out the wonder drugs to H7N9 bird flu.
The Frenchman pointed to the spoon and asked me ________ to call that in Chinese.
We have realized ________ she is expecting is just an opportunity to test her ability.
—Haven't I seen you some place before? —Yes. That's ________ I don't go there anymore.