连词成句。

1. was, while, walking, I, saw, to, I, a, in, cat, school, a, tree

2.  while, walking, was, car, the, exploded, past, I, it

3.  said, he, living , he, in, was, London

4. I, speaking, to, you, you, the, were, while, saw, teacher

5. I, at, TV, 8 p. m., was, yesterday, watching

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