6. Last night I was watching the news about Obama’s wining of the Nobel Peace Prize on TV ________ the power went off.
It was _______that they went for a walk in the park.
-- Tom has made great progress. -- _______, and _______.
Sarah,hurry up,I’m afraid you don’t have time to________.
I usually don't have______ supper, but I always have ______good breakfast.
I ___ my university professor in the supermarket near my house, which was out of my expectation.