.The universe began with the Big Bang 13.7 billion years ago, with everything___ in space smaller than a grain of sand.
The accident happened on such an evening with strong winds ________ by heavy rain.
The moment the World Expo ________ open, the whole audience cheered.
After graduation, he got an opportunity to go to America for further education, and all his friends envied ________. In other words, his good luck is ________ of his friends.
Peter ________ to evening classes since last month, but he still can’t say “what’s your name?” in Russian.
They ________ for two years and haven't been in touch with each other for a long time.