题目内容
.The universe began with the Big Bang 13.7 billion years ago, with everything___ in space smaller than a grain of sand.
A. started B.starting C.to start D.to be started
B
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题目内容
.The universe began with the Big Bang 13.7 billion years ago, with everything___ in space smaller than a grain of sand.
A. started B.starting C.to start D.to be started
B