The universe began with the Big Bang 13.7 billion years ago, with everything___ in space smaller than a grain of sand.
第二节:语法和词汇知识(共15小题,每小题1分,共15分)从每小题所给A、B、C、D四个选项中,选出可以填入空白处的最佳选项。Our teachers are really ______. They often work in their office far into the night.A. open-minded B. hard-working C. self-confident D. warm-hearted
-- Jane Gooddall is a great woman.-- ______. She has done so much to protect chimps everywhere.
Email, as well as letters, ______ an important part in daily communication.
Look, dark clouds are gathering. It is ______ to rain soon.
When I get older, I will be stronger. They’ll call me ______. Just like a _____ flag.